Again whatever you want to call it thorough or exhaustive doesn’t matter time is not the key factor. Time has nothing to do with either one of those words.

Anyone can spend a lot of time researching a topic it does not mean they understand it. Likewise an expert in a subject does not need much time at all to research that topic.

You can’t be this dense as to not understand this. Focusing on the amount of time something takes as a measure of quality or effort is foolish.

Experts will always require less time because they have essentially done much work ahead of time