A HS or college degree is a testament that you learned a standard set of things, had reasoning ability to solve a class of problems. etc. The only way they can certify that is to test you. Could there be other paths? Yes, but that would best be served with school autonomy where they set the standard of expectation for their degree and you live with it’s acceptance.
Abolish the National Department of Education for a start if that’s what is wanted, though much of the blame for the failure of the system belongs on students, parents and politicians.
If you are still in school and struggling with math, I recommend https://betterexplained.com as a path that makes sense for many who think they can’t learn math.