They aren't for you in this context then. The value of an LLM that can write passable code is not to take an experienced developer and make them better, it's to take someone who can't code at all and allow them to generate code. Whereas it might make you 10% better (or whatever your estimate is), it makes them infinity times better as it allows them to do it at all, even if it's not very good.

Think of it like an accessibility aid. It doesn't help people who don't need them, but for those who do it's life changing.