But it did.

And complex, and difficult to use with the land constantly shifting. Even if the ground you were on did not change, a new mountain range 100 miles away still altered the visual references of the area.

Also, as DomA points out, the AoL with their high tech and refined techniques were probably used to a much greater degree of precision. If you are used to knowing 100% and that is your standard for knowledge, adjusting to a point where you only know maybe 70% is going to feel like rushing into something blindly. Since the Power won't work if you don't believe it will, it could be that once the Breaking started rearranging the geography, the AoL Aes Sedai, used to the equvialent of GPS coordinates, could no longer use the precision with which they were accustomed to Travelling. Look at Aran'gar's scorn for Gareth Bryne, blundering along with what to her standards is complete ignorance of his surroundings, and no sophisticated command and control systems or communications with the extreme ends of his army. From her perspective, he is stumbling along in the dark, while to him and any other general, he is only operating under the conditions to which he is accustomed, and when his scouts are reporting in, feels like he has a clear view of what's going on. So in contrast, a channeler from the Third Age, despite what an AoLer would consider an appalling ignorance of his surroundings or destination, feels fully confident in opening up a gateway, that same AoL channeler, with none of her accustomed data flow or precise information, would be thinking "I don't know ANYTHING! How can I make a gateway work under these conditions?" And if you THINK you don't know enough to open a gateway, than you really DON'T know enough. That's how it works.

What was his first impulse? As a child, with no thought of the consequences, he was going to start tearing apart the palace! Rather than DISprove, this SUPPORTS my assertion! Even a guy who is simply reduced to an innocent child-like state, is still inclined to destruction! And he would certainly have become worse over time, and less amenable to the fortunate reason Min was able to impart to him. Even a mild and initially unnoticable form of the madness, that appears superficially benevolent, is still inclined to casual destruction.

There is also the point that it is not particularly useful if you have nowhere to go (why do you think Nynaeve & Elayne never bothered to ask Moghedian about Traveling? They were committed to their course of remaining in Salidar, despite occasionally floating the notion of leaving). For the typical channeler in the Breaking, there was always more than enough to deal with right in front of them. You are also operating under a blind assumption that the recruiting and training continued as normal. In fact, channeling crops up in any group of people, even those who were out of contact with the official, organized Aes Sedai. Since, for all intents and purposes, Aes Sedai & channelers were one and the same in the AoL, the channelers spontaneously arising among the people would have gone by that title too. You are assuming that the Aes Sedai of the late and post-Breaking were all taught by AoL Aes Sedai or by the students of AoL Aes Sedai, when in fact a lot of them would have learned on their own, or been taught by wilders. The account of the founding of the White Tower in the BWB is far more suggestive of seperate and independant groups making contact with one another once things had settled down enough that human populations could stop worrying about the urgencies of immediate survival. I doubt few of those groups or their antecedents had any more connection to the official, formally-trained channelers of the AoL than a half-recalled name from legends that they began using for its prestige. It's like the office of Senator in the United States - it may be taken from the Roman name and body, but there is no unbroken chain of tradition or teaching - it is merely a name resurrected for the gravitas associated with it in antiquity.

Expecting the Aes Sedai of the AB era to retain the teachings of the AoL Aes Sedai, is like assuming US Senators should all speak Latin, and recall the minor laws and regulations from their days as Roman quaestors and praetors.

And what makes your disagreement the equal or superior to our agreement?

Indeed.

And even if they had it, why would you assume that anyone who knew it had contact with all other Aes Sedai? All institutions and groups and people from the AoL were wiped out. People were knocked down to feral savagery and hunter-gatherer levels. There is no reason to believe that the AoL Aes Sedai did NOT die out without ever getting the chance to teach their knowledge or that those students they DID teach survived long enough to teach others. In the ordinary wilderness, a trigenarian is ancient - in the Breaking, people were probably fortunate to live to see their offspring walking before they themselves died. You'd think surgery a whole host of other skills would be too useful to forget or to not teach, but the civilized folks were ill-equipped to survive in the new world, and died out, while people who grabbed & ate the first rat they saw instead of studying lost techniques and lamenting the passing of civilization, were the ones who survived to pass on their genes. Channelers would have arisen within the tribes and clans and whatnot even if they never saw an Aes Sedai, and the old stories and legends would have preserved the name, like those of the Forsaken, who seem to be remembered almost like gods (rain is caused by Semirhage crying from the Dark One's beatings... ), rather than villainous men and women. You seem to be stuck in the mindset that Aes Sedai are an ongoing organization which has simply mutated and adapted over time, when in fact, they were a group that was wiped out, and their name appropriated by a new group that did what they did.