If we for instance take, as an example, someone thoroughly explaining something which is clear to 99,9999% of the earths adult population don’t you think the remaining .0001% could come up with some? I get that this community is a place to allow people to ask questions they can’t or won’t ask elsewhere but I certainly feel stupid sometimes when I ask questions while attending courses etc.
So bottom line, how do you ask questions when you feel stupid?
Because for each thing that "Everyone knows" by the time they're adults, every day there are, on average, 10,000 people in the US hearing about it for the first time.
(The alt-text is also particularly relevant)
There's also ELI5, which may be more useful in some cases.
ELI5 is nice, I use that for work at times! I also like the positive way of looking at hearing new things for the first time. I guess insecurities behind asking stupid questions comes more from the point of view of being judged by people who are ignorant themselves.