Generic is not the same as bad
Generic prose is grammatical, accurate and well organised. Its failure is that it is indistinguishable from the other twelve pages answering the same query, which in a search result is all the difference that matters.
It is also what a model produces by default. Asked about quality assurance, it draws on every text about quality assurance and lands on the common denominator, which is technically correct and adds nothing to what the reader already knew.
The common denominator is not worthless as a starting point. It is worthless as a finished page, because the reader's question was specific and the answer is general.
So the job is not to make generic prose correct. It is to make it yours, and that requires material the model did not have: your numbers, your constraints, your failures.