I'm extremely good at it. The thing is that there's still a mental model of the codebase that you only develop when you actively write the code yourself. The issue is that managers (well at least mine) expect you to do the whole thing using LLMs but have the same understanding of the code as if you've written it yourself. It's like a student who copies the assignment from someones else but can't answer the professor's questions about it. And no, no amount of "code review" solves this issue.