Perhaps your objection is that, because the target question is not literally identical (for example, maybe a code sample has different variable names, or the setup has an irrelevant difference in the container type used for a collection, etc.) that the answers don't literally answer the new version of the question. That is completely missing the point. It's not a forum. The Q&A format is just the way that information is being presented. Fixing the issue in your, personal code is not, and never has been, the goal.
That's not the case. As a maintainer of a popular project who has engaged with thousands of Qs on SO related to that project, I've seen many Qs marked as duplicate where the actual answer would be different in a non-trivial manner. When I look at who all moderated on those Qs, they are usually users who haven't contributed to that topic at SO.
Yes, it is. I have been active on both the main and meta sites for many years. I have seen so many of these complaints and they overwhelmingly boil down to that. And I have gotten so unbelievably stressed out on so many occasions trying to explain to people why their trivial objections are missing the point of the site completely.
> I've seen many Qs marked as duplicate where the actual answer would be different in a non-trivial manner.
Please feel free to cite specific examples. I'll be happy to explain policy.
> When I look at who all moderated on those Qs, they are usually users who haven't contributed to that topic at SO.
That is generally irrelevant.