Disclaimer: US-centric perspective
Elite colleges generally students who are "genuinely" (insert adjectives here), not yet another honor roll student with a boring essay about how their voluntourism trip to Africa changed their life. In a competitive field like that, you want to stand out, and you stand out a lot more by doing something that both clearly signals being good at things and is different from the signals that other students are sending.
Therefore, doing whatever other students of your socio-economic status do is a bad strategy. Much better to do something impressive and different.
If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "