I come from a physics background. We used to (and still) have a ton of physicists who decide to dable in a new field, secure in their knowledge that they are smarter than the people doing it, and that anything worthwhile that has already been thought of they can just rederive ad hoc when needed (economists are the only other group that seems to have this tendency...) [1]. It turned out every time that the people who had spent decades working on, studying, discussing and debating the field in question had actually figured important shit out along the way. They might not have come with the mathematical toolbox that physicists had, and outside perspectives that challenge established thinking to prove itself again can be valuable, but when your goal is to actually understand what's happening in the real world, you can't ignore what's been done.
[1] There even is an xkcd about this: