OK so highschool lasts maybe 4 years give or take a few years (depending on what country you're from and how well you can do in school.) In highschool there are two types of people. Those who stay true and those who don't (as you so kindly stated).
The first go on to enjoy the rest of their lives without too much difficulty (because university is much bigger and cool is individualism) making many friends and well just all around awesome. The others lose them selves in the constantly changing mold of society