I'll agree, it matters.

Sometimes it does not matter thought. In my money making project there are areas of the code that are sometimes used by me basically, and very infrequently at that. Since it is an isolated route, I'll let the code fly and maybe write tests to verify it is working properly and not clean it up. But, yeah, it isn't mission critical.

For areas where many users rely on it daily, I review the code much more carefully and fix formatting issues. Because as I add features etc. I want it to be easy to reason about the code.

I think another important reason to actually care about quality and standards in code generated by AI is that over time, if not addressed early, future AI sessions will pick this up as a pattern and will dramatically magnify the effect of deteriorating code, leading to highly overcomplicated code for every request.