> how trivial the problems they solve are
A single line of code IS trivial. Simple code is good code. If I write the first 3 lines of a complex method and I let Copilot complete the 4th, that's 25% of my code written by an LLM.
These tools have exploded in popularity for good reason. If they were no good, people wouldn't be using them.
I can only assume people making such comments don't actually code on a daily basis and use these tools daily. Either that or you haven't figured out the knack of how to make it work properly for you.