That’s not a biochemist, memorizing the amino acids is literally biochem 1 on college. Most people with a biology undergrad take that.
Being a biochemist is more about understanding the whole system of how proteins interact, and not really about memorization of any specific protein.
The sad part is that there isn’t any real answer, like a lot of fundamental things in science we don’t really know how it works and won’t for decades. My personal theory is more along the lines of the whole tearing muscles concept is crap and exercise is basically just a signal for your body to make more muscle and doesn’t directly cause anything.