Why DON'T more professors preach the feminist message?

Education, though it can be valuable, is a system of indoctrination and programming. The Professors teach the programming that was taught to them. Since professors often have a very long career, changes in the essential messages take time. Professors teach what they know, if what they know does not include the feminist message, then they cannot, in good conscious teach it. Keep in mind that there are a variety of world-views out there, some of which do not hold a feminist message as necessary or paramount.