But the kids with the iPhones will be the financier controlling the purse strings. See the Commodore vs. IBM clones vs. Mac in the early 1980s. Apple wins because wealthy people use them, it's Apple's advantage.
What's your evidence that Apple "won" because of computers bought by rich families in the 80s because last I knew after the mid 90s Apple got (checks notes) massacred in the computing world by Microsoft and the rest and really only won in the mid 2000's via consumer electronics with the creation of new markets that they've largely dominated since.
I guarantee that kids who grow up to be financiers won't be a significant fraction of the 87%. Just like kids wearing Air Jordans when I was in school didn't all grow up to be pro ball players.
It's at least arguable that kids that grow up with the means to afford new iPhones will be more likely to have the means to go to a good college.
No disagreement there, but cargo-culting the iPhone isn't going to give poor kids rich parents