>>16703897 (OP)Because physics is reality.
Learn a model, and you also have to learn its "weird" assumption and its seemingly randomly occurring laws, then you learn of its baffling limits and they tell you that the model completely falls apart at some point, making your research of "pure knowledge" look like some kind of waste of time.
"why didn't they teach me the CORRECT thin to begin with??"
You move on onto the next model, and the process repeats.
This is because physics is reality. We try to model using math better and better, getting as close as possible to the real thing, but a model is still just a sketch of the real (usually much more complicate) thing and so it will inevitably fall apart for the n-th time eventually.
In math, you have none of it, because math is pure abstract logic, it's correct by construction.
This doesn't help you directly understand and predict the behaviour of the real world, however: the only practical use of math is to provide instruments to more efficiently (but still approximately) model physics.
Of course if you simply like to pursue "pure logic" this is a non-issue, and instead you get annoyed and stressed at physics because of all the pesky laws, costants to remember, "unelegant" parts of a theory and mostly, the inherent approximation of the thing.
So if you feel annoyed at the "dark number" in that picture, create a better model in which all the "right" numbers come out more naturally (and prove that your model STILL describes reality just as well or better than the current thing).
But just remember: no matter how pretty your theory will look, it will almost surely end up being proven wrong in the end.