And physics is somewhat "understandable", as in given enough inputs (some measured physical stuff + some maths) one could say that from a certain point on he/sh

And physics is somewhat "understandable", as in given enough inputs (some measured physical stuff + some maths) one could say that from a certain point on he/she "understands" physics, but what should we do when it comes to social sciences? Take history for example, we don't actually know the exact reason for why Hitler came to power. Was it the fault of the Weimar democracy? Was it the fault of the Nazis themselves only? A combination of the two? Some other third factor? And, most importantly, can that happen again? We actually do not know, and we're talking about one of the most important events of the 20th century, an event that directly caused the death through extermination of millions of people. And if you extend that line of reasoning to other similar events you'd discover that we are in the dark there, too (afaik we still have no direct proof for what caused by Great Depression, we're not even sure why the Great Depression "stopped" or when exactly it "stopped"). Which is to say that we're navigating in the dark most of the time when it comes to education, saying that we "understand" some stuff is only the exception, not the rule.