Well, they do know the tech stack, the domain, the specific problem. Now they know whether the solution resolved their specific problem, if their code review/testing caught any bugs, etc, etc.
If anything, they have the most amount of information in this context. I really don't think of them as being the least qualified.
Yeah there’s an argument for that. I think it’d hold more weight if narrow, specific, and loosely defined duplicate questions were allowed - but they aren’t.
Questions and answers belong to the community. I think the accepted answer should too - maybe after some period of time.