Went to the same school, was on the same math team, but was a year ahead of the author. Quit math team in my junior year because I wasn't at a competitive level, but it was a great time while I was on it. As a SWE, I rarely get to exercise the tenacity and problem solving skills I learned on the math team, but when I do they are "transformative" to the rest of the team.

> Nights were for other worthless extracurriculars to pad out our applications. ... The worst part was knowing that it was all going to be extruded into a few lines in an application form, that a committee would review for about ninety seconds

This is the tail wagging the dog; work really hard for 4 years in HS so that the next 4 years will be spent at a comparatively more prestigious college. I don't think we should expect high school students to be able to optimize this correctly themselves, and from my experience guidance counselors weren't particularly helpful. College admissions feel like a local maxima that have a lot of unintended side effects but would be difficult to change.

Personally, I didn't do the extracurriculars that would look good for college, but rather the ones I enjoyed; I didn't study very hard either. Didn't get into Stanford or an Ivy, but I look upon my experience in high school/college fondly rather than bitterly. Life seems to have turned out ok too.