Why wouldn't you be able to do identify the 10% that you need to fix?
AI is not an excuse to turn off your brain. I find it ironic that many people complain that they have a hard time identifying the hallucinations in LLM generated content, and then also complain that LLM's are making LLM users dumber.
The problem here is also the solution. LLM's make smarter people even smarter, because they get even better at thinking about the hard parts, while not wasting time thinking about the easy parts.
But people who don't want to think at all about what they are doing... well they do get dumber.
It is extremely well known in the world of programming that reading code is substantially harder than writing it. Just because you have the code in front of you does not mean that determining that it is correct is a trivial (or even moderately easy) task.