I can't be sure, but I suspect at least some users have issues with the difference between "good subjective" and "bad subjective" questions - which isn't an easy call to make for anyone.
When I see a close vote on an older question in the moderation queue, I look at how old the question is, what the votes are, whether an answer was accepted, and the quality of the question. I don't vote as often as I used to, because as a moderator my vote is enough to finalize the action, but when a question obviously should be closed, I'll close it, and when it shouldn't, I'll vote to leave it open.
The question you linked is one I voted to leave open.
The other thing I do when I can is comment on questions that could be improved asking the poster to make changes that would improve the question so that it can be better answered and isn't as likely to be closed out. If I can and I have the time, I'll edit the question to try to improve it.