Thanks for all helpful replies!
But there’s still one problem concerns me, which I failed to imply in the initial post, that though awards and accomplishments as “musicians” or “football players” cannot be fake, it’s not hard to “fabricate” or exaggerate qualities simply in the essays. Unfortunately, those “qualities” seem to be exactly the things universities are looking for. Any smart student can make everything seem nice in the essay. For instance, as long as one has a minor role in student government, he can indulge in verbiage, talking about how “committed”, “responsible” he is. People in the same school but not knowing exactly what he really has done may buy it, not to mention the admission office.
As for @austinmshauri’s personal engagement about me, the answer to your question is simply that I spend most time on what I’m good at and consider distinctive. I’m not athletes who can win national games, and I can reach all those benefits you listed through other methods. The volunteer work, to be honest, is ridiculous and meaningless for students with normal background and hence little power. Rather than 200 hour community service or some small-scale fuss, I prefer studying 200 hours, trying to reach higher position in the future, and then it’s time to be philanthropist. The difference in efficiency here is quite obvious. Also, as I mentioned, I can absolutely tell you a lot about how I sacrificed and feel genuinely happy through volunteering, if I only want to give a good impression on the internet, with this just-signed-up e-mail account for college confidential. But actually, I hate talking about things that cannot be verified, even though I have to do so for most of my time in real-life.