Expensive marketing.
when you buy a pop out of the machine, what fraction of what your paying for is raw material + production cost and what percentage is so the can pay for superbowl ads so the next time you're thirsty their brand is the first the pops into your head?
In my case I said no to a top 10 engineering undergraduate school offering some scholarship and yes to the University of Alabama which was my grandad/dad's alma mater and thus our football team, an in-state school with cheaper tuition offering a lot of scholarship, and not Auburn University which had a slightly better engineering program rank but were UofA rivals. Had a _great_ uni experience and would make the same choice every time.
Had no trouble getting a job in a large company as a kernel developer straight from uni. Sure maybe doing MIT or Stanford I could have been a HVT for ~Google or I would have been in an impromptu startup by junior year.. but those student ticket prices!!!
Roll Tide. Still fly back a few times per season to go to games.
However, I know some very smart people who did actually choose their undergraduate program based partly on the football team.