this is a bit of a stretch in that the concepts used in category theory are surely useful to programmers, but in reality programming is often sufficiently compl

this is a bit of a stretch in that the concepts used in category theory are surely useful to programmers, but in reality programming is often sufficiently complex that category theory is too general to apply. you can spend all day drawing diagrams about morphisms, direct products, pullbacks, etc but the real work is in coding the api, not drawing pretty pictures. most programmers don't have the time or inclination to complete an undergraduate degree in mathematics, which is essentially a prerequisite for taking a legit category theory course. category theory is usually taught at the graduate level. category theory definitely helps in theoretical physics :)