No, that's not what it means. It just means that the benefit must outweigh the risk, as always. Making surgical patches to existing code is also quite different to introducing features, which is what developers typically spend their time on. Not that same-day patching would imply literally zero time to review either.

That does not follow. Somebody stills needs to set it up. And maybe to sign off. The AI could instantly diagnose and summarize the problem and its remediation and you say the word.