When I find questions with a poorly placed close vote, I try to immediately leave a comment why I disagree in the hopes that others will see it before too many votes are cast.
Whenever I ask a SO question, I have to brace myself to spend the next several hours defending my question and correcting misunderstandings that I'd already anticipated and addressed in the question. It's exhausting.
I do this too, especially when my own questions are incorrectly flagged - but the dodgy reviewer invariably ignores me, and others soon follow suit without bothering to actually check what they are flagging - and if they don't, my question is ignored and buried: I assume nobody wants to spend time answering a question that has a close vote.
