I've searched old questions about the very short time for closing a question and unfortunately there are a lot.
I didn't get all of them (IIRC there was like 10 other pages to check them all) but I found 7+1 (mine) + a lot of others where they discuss similar issues.
And one question is
Why the rush? What's wrong with waiting one hour? even one day? what's the worst thing that could happen?
Some of you might say, that "it prevents opportunistic answerers from answering the post" but come on.. since when could that be a problem?
Let's suppose they answer the psq, it wouldn't matter because if OP doesn't provide context within a day, then their question will be closed and eventually deleted. Problem solved.
I do understand that rules are rules and math.stack has them and one should follow them. Yes. I have nothing against to Close questions provided that OP is already familiarized with math.stack (which I think should be after your 5? 10? question) in that case I'd even support immediate Close.
The problem comes when OP is totally new, and the problem start to grow when OP is not American, doesn't know MathJax, is not aware of the "common tongue" from math.stack users, is a freshman (with exceptions), has never been on a site like this before, etc.
See this for instance "Very often I see a user's first question getting down-voted and eventually it ends up being closed. Usually I find this to be too rough of a treatment, as the user is not accustomed to the site." from here or "..new users, not necessarily aware of MSE's "common tongue" " from here or this "When I was totally new as a user I found myself helpless by the comments and downvotes of relatively senior guys" from here this later is ouch!
This problem is here since
2014 Too quick to close
(I'm sure there are more in the other pages)
New decade, and the same holds..
I do really hope this could be handle a little different on math.stack and it's new users. Even SE staff told us about it
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Why did they do that then? I mean why specially with newbies? Because they know, a newbie is a newbie and usually tends to do something unusual.