In my own experience ~7/10 times the duplicate question is something entirely different and I have to spend longer searching because of someone's ignorant pedantry.
I asked a specific question about text wrapping in Java SWT a couple months ago. It was quickly closed by a Java gold badge holder as a duplicate of a question asking what the best Java GUI framework is... which had nothing to do with my question. Thankfully, few hours later another Java gold badge holder reopened it, and answered it.
If it happens 7/10 for you it should be easy to find and link to some blatant examples. Since I have the rep to vote for reopen, we might be able to improve the world together.
Myself I've witnessed first hand a question about networking being shot down on networking because it was between company networks instead of inside company networks.