Re #5: there are a few more scenarios:
Go to each school and then dont get into medical school. Either by dropping out early on due to insufficient grades, or going the whole route and then not getting in.
You can apply guesstimate probabilities for each scenario.
In these alternative scenarios, maybe " ïvy league clout" will turn out to be worth something, after all. Or maybe not. It was worth something to me.
Or you might have just had a different undergraduate experience that you may have preferred. Or not.
There are lots of students at Brown, and at Cornell, who are premed, and most of them probably had cheaper alternatives.