I think that another part of the burden on some high school students is the arms race to get into IVY LEAGUE SCHOOLS!!!! (My understanding is that not all high school students get worked so hard)

Certainly, the private high schools that are on the college-prep track around here are all focusing on that idea. Our students get into IVY LEAGUE SCHOOLS!! is always touted over and over again at prospective student open houses (often by parents who resemble the wide-mouthed frog). It wouldn't surprise me if this is also the case at the high-achieving public high schools like Brooklyn Tech, etc.

Personally, I think it's insane and abusive, but that's just me.