It's not stupid, it's a fundamental principle of the OP: the more precise/deft you are, the less power you need to accomplish the same task, because your weave is more efficient. It's the same weave, it's just more precise.

There are many components to the Travelling weave: a part makes the hole or the folding, another relates to the starting location, another to end point. You can vary the precision of your end point.

In Androl's case there's likely more than just deftness involved. He might be more "in tune with the Pattern" and have a better inner sense of how to translate his location into his weave, and where he wants the gateway to open, and how big it is. He probably needs only a fraction of the time the average channeller does to "learn the ground". Most people's Gateways aren't fancy things: they are very power-intensive weaves, most likely to compensate for their lack of precision. They probably put a lot of OP in there that wouldn't be necessary if their weaves were more precise. You really need that small thread placed just so, but most channellers can't place it just so and use a bigger, more clumsy thread.

Androl's are fancy. He's far more efficient than the average gateway maker and needs just a fraction of the OP they have to put into their weaves. He's extremely precise, for example he can use tiny gateways as cutting tools.