Voting to close as a duplicate is a tricky vote. Tricky because there are various levels of "duplicate". There are duplicates which are just that, exact duplicates asked before by the author who for some reason asks them again.
Then there are those possibly less obvious cases where a question is, though differently phrased, essentially asking the same question. Or even trickier, seemingly asking a different question, but which would ultimately result in the same answer.
When I vote to close as a duplicate, if the question does not fall in the former category, I do tend to be more careful. And if I have a hunch, but am not 100% sure, I tend to stay away from them, maybe commenting that it might be a duplicate.
That said, I don't want that privilege taken away from me when I'm not an active participant in the tag. Because it would mean I could often not vote on the former case, and even in the latter case I feel from experience that I tend to be correct.
In the end, questions need 5 votes to close. Not just my single one. And once a question is closed, and has been unfairly so, it can still be reopened. One example of what might be an unfortunate case is to me no reason to enforce proof of knowledge (well, proof of participation really) within a tag to be able to vote for a duplicate.
And I've narrowed it down to dupe votes, because that's what seems to be under discussion. If you mean this to be a request for all close-vote types, then my point of view on that would be a somewhat sassy "H*ll no"....yeah, I don't really pull those off, do I?