I've certainly come across a lot of questions (that I've also wanted to know the answer to!) that have incorrectly been closed as a duplicate of something else

I've certainly come across a lot of questions (that I've also wanted to know the answer to!) that have incorrectly been closed as a duplicate of something else that's not really the same. But I suspect there's a lot of selection bias going on: by the very fact I'm searching for that specific unusual case, I'm going to come across this type of question that looks like a duplicate to the untrained eye. On the other hand, people doing the reviewing also see a raging torrent of actual duplicates, and maybe many of those claim their situation is slightly different when really it isn't, causing the reviewers to get jaded.