The theory of relativity has quite clear thoughts about why there is a "speed limit". Entire branches of physics ponder about why and when electrons and other particles came about.
The shrugging "Don't know, we just noticed it." that you ascribe to scientists' reactions does not match reality.
Where do electrons come from? Or any of the other fundamental particles. Please, enlighten the world of science.
"Fundamental constant" means "we don't know why it has that value, we just noticed it does"
You're proving my point, people don't like science because folks like you make it seem filled with all knowing experts when really the most fundamental questions are not answered
I say this because it undermines your hope that epistemology and metaphysics is merely a matter of explaining where electrons "come from"; the question is so wrong that it must be entirely rethought. An electron isn't a dot in space, but a behavior smeared throughout a region.
I thought that the reason that folks didn't like science is because they were preoccupied with Jehovah/etc. but perhaps I'm wrong.
People don't like fields when there's a bunch of gatekeepers who can't resist posing as experts and shun people who ask simple questions which they can't provide answers for. That's part of Eric Weinstein's critique of today's particle physics community which I share.
I'm asking because you are giving the impression that whatever answer you get, you will reply to with "but why?" and "that's just passing the buck down".
A fundamental thing about science is that we'll likely never have all the answers. You can always ask "but why?". That's not gatekeeping but the difference to religions which often times claims to have the final answer. (Ironically there is a lot of gatekeeping in religion since not everybody is permitted to interpret scripture as they wish.)