Because when you go into a college you see this:
Your parents will buy anything so that you are successful.
Just ask them for a MacBook and they will probably buy it since they have already put so much money into your college experience.
Once you buy a Mac, you become one of them
Once they get into the real world, they buy computers that fit their needs more. But, in college, they will buy a Mac because everyone has one and they are cool and trendy.
There is a reason you don’t see many Mac ads. Apple has ads built into so many youthful activities.
Netflix originals use Macs. Schools use Macs. Writing software is better on Macs so you see writers in coffee shops on Macs. etc.