Those who already have a high level idea of what to do and roughly how to execute it benefit the most from LLMs at the moment. This is very good for purely "technical" devs in greenfield environments. Less useful for super large interconnected codebases, but tools are getting there.
It will not, however, make a bad dev a good one magically. A bad software product is not usually bottlenecked by the software its running on, its bottlenecked by user experience and pmf. That still requires some skilled human input, but that could also change soon. Some people have better product intuition than others but couldn't execute on complex code, so LLMs do help here to an extent.
As of 2025, I think you still need to be a pretty decent dev even with LLM assistance.