>This “trivial” stuff is often not trivial when done well.
I loathe to say it but you've been got. Reread the OP in a sarcastic tone, you'll see what I mean.
I agree with what you're saying but in the spirit of disagreeing with OP, I would devilishly advocate:
When evaluating extracurriculars, there is a chance that the type of extracurricular may matter as much/more than the degree of participation, which can be problematic.
In theory, colleges are just a place where you go to learn. So it doesn't make much theoretical sense to me that an admissions officer would probably think different things when they hear "rugby captain and president of the debate club" as opposed to "full time brother and avid programmer." That's because traditionally, colleges are also where children of privilege learn what the status quo is and how to fit in with one another. Of course we have to measure something other than SAT scores (i.e. IQ), we have to measure how nice they are/capable of leading/willing to learn (i.e. how white they can act/how much their parents know about and push them towards traditional leadership positions/how much free time their family can afford). To some degree, it isn't in the interest of the college to admit someone who isn't also a cultural fit; but the more important culture is in your selection process, the more problematic that process is.