Do you have a source that sports are a net financial positive for schools?
Here’s an article about students being charged thousands of dollars each per year for sports programs: https://www.nbcnews.com/news/education/hidden-figures-college-students-may-be-paying-thousands-athletic-fees-n1145171
Here’s an article showing that only 25/65 Division I schools had a net positive revenue from sports: https://www.bestcolleges.com/news/analysis/2020/11/20/do-college-sports-make-money/, with those losing money losing a lot more than the ones making money.
Just search for “college sports net revenue” and I’d be surprised if you find much, if anything, that agrees with you.
Yeah, the few at the top bring in revenue, but most don’t. Speculating on future revenue is not helpful.
If you’d read the links I shared, you’d see the revenue figures include alumni donations, and they’re still a net negative for the majority of schools.