Edit (25 Feb 2021): as per the discussion on the Meta SE in the comments underneath my question there, it was suggested I ask a new question here on Quant SE Meta with a much narrower scope, such as "Should we allow fewer votes to close questions, instead of the current 5". Also, as per Bob's comment below, this is more likely to succeed in implementing, rather than his current request to allow users to make questions invisible.
So I will post a new question and ask as many users to vote on the question as possible (either up or down vote). Also please comment underneath the new question whether you feel we should allow only 2 or only 3 higher-rep users to close questions, instead of the current 5. If we get enough votes and discussion going, then the next step would be to ask for implementation on Meta.
I know similar questions (points) have been raised before, but I wanted to bring it up again because it seems that especially recently, Quant SE is regularly flooded with low quality questions.
Is there any way to simply delete these or make these invisible for everyone but the OP and the admins, without multiple users having to vote first to close these?
Or perhaps users with a certain reputation threshold (say 5K reputation: to make it clear that I do not intend to benefit in any way from this proposition) could make these low quality posts invisible (for anyone but the OP, the admin and themselves) without the admin having to take action? (We only have two admins on Quant SE, and they probably can't be here 24/7, only dedicating their time to deleting or making low quality posts invisible).
Perhaps there should be a renewed discussion about what Quant SE is really for and who the intended audience is: is it really just for professional quants? If the answer is yes, then the low quality posts should not feature here at all (and perhaps another SE website ought to be created, such as "Finance", where simpler questions can be asked).
Or perhaps Quant SE is not just for professional quants, but also for undergraduate students and aspiring quants: that is completely fine too, and perhaps makes Quant SE more lively and frequented by more users. But even in this case the very low quality posts should still not feature here, because they degrade the quality and the reputation of the website (albeit the bar can be somewhat lower than in the former case, of course).