Because being precisely correct is especially important in technical documentation. GenAI is great at producing loads of content that looks sort of right, but terrible at logical correctness and, to a lesser extent, brevity.
In my original example I asked Q about sorting in DynamoDB. The answer it gave was categorically wrong! That's worse than useless, it's actively misleading. If it can't get a simple example correct I have no faith that it will be reliable for more comicated real world questions, but those mistakes will be harder to catch.
as another anecdote, Q advised me to update a security group with a rule to allow ingress traffic on specific ports from a Lambda function execution role. It's jumbling up documentation from two completely different security tools; it's only a matter of time before Q causes a prod incident somewhere.
In my original example I asked Q about sorting in DynamoDB. The answer it gave was categorically wrong! That's worse than useless, it's actively misleading. If it can't get a simple example correct I have no faith that it will be reliable for more comicated real world questions, but those mistakes will be harder to catch.