So Harvard (and the other Ivies, as well as NESCAC schools) have those sports, along with baseball, softball and wrestling. I’m a fairly cynical person, but I’m not cynical enough to believe that these schools have upper SES sports for the primary reason (or even a small reason) of attracting more full pay students, which if I understand you correctly is what your argument is. I think that they want to appeal to a broad range of interests and offer as many opportunities as possible. They offer the sports that are likely most familiar to those from a lower SES, and they also offer sports that are typically associated with higher SES students. And any student is welcome to enjoy, and participate in, any of the many athletic offerings.