Anyone can be an encouragement to someone like a younger me, but a lot of people don't. The ones who do however can really make a difference in peoples lives.
The thing about college is it forces exposure to stuff you'd never see otherwise. A lot of it is irreplaceable but more and more of it is thanks to sites like these.
Put negatively, if you're not interested in further educating yourself outside of your direct interest areas, understand that you will have certain limitations in life that you will not yourself perceive.