[Dire]

I think this depends on your goals in poker. Most of the regulars at stakes like $200, for example, are just really not good at all and have serious flaws in their game. Obviously not even remotely close to the flaws of fish / donks / etc. But refusing to learn to exploit players who aren't completely terrible seems like a good way to stunt your growth as a player and potential for improvement / moving through the stakes. Table selection at small stakes seems likely, for most, to maximize short term results but harm your potential long term results.

Not to mention playing against regulars is just a whole lot more fun than taking some fish's money, or stealing a nit's money blind by blind.