alt Hacker NewsNo they don’t “have” to do any of this as evidenced by the fact that the US is the only country where it happens. In most countries it would (rightly) be considered strange to care how good someone is at sports or marching band when evaluating their ability to study academic subjects (the actual purpose of a university).
That feels like a fairly narrow view of what the purpose of a university is.
Look at the charter of any university and they do not just say: "create students who excel in their academic subject of choice".
The vast, vast majority of higher education mission statements/charters include goals like: "helping students develop their identity", "pursuing meaning", "strengthening community", "sharing perspectives", "helping others", etc. etc. etc.
Things like "can this person work on as a team (did they play sports?)" or "have they been a part of a community (like marching band?)" are hugely important for building a community at the university that can successfully achieve those mission statements.