>I call these "embarrassingly solved problems".

When LLMs first appeared this was what I thought they were going to be useful for. We have open source software that's given away freely with no strings attached, but actually discovering and using it is hard. LLMs can help with that and I think that's pretty great. Leftpad wouldn't exist in an LLM world. (Or at least problems more complicated than leftpad, but still simple enough that an LLM could help wouldn't.)