I think what you're describing is, easy tasks are easy to perform.

Which is, of course, true. Anecdotally, a lot of value I get from Copilot is in simple, mundane tasks.

I think easy tasks are basically "linear" in that you don't have interactions between components. If you do have interactions between components complexity gets out of control very quickly. Many practical problems for instance are NP-complete or undecidable. Many of them could be attacked by SMT or SAT but often you can solve them using tactics from math.