One guy I work with has little formal training (and mid level experience), but do a lot with LLM's. But in every situation he has to do anything without an LLM he heavily struggles/are not able to anything (say a basic sql query). There is no way someone with his experience and position would still be at that level.

I guess people differ in thinking that is a good or a bad thing. I think it makes up for a huge risk, as he cant really judge good from bad code (or architecture), but his supervisors have put him in a position where he should.