I’m with @mamalion.
Of course we have no idea what colleges this kid is applying to, no reference point at all. So we don’t know if the schools review holistically or primarily by stats.
And we have no idea how OP’s daughter will make this essay relevant to a college admit review. (Plenty of kids get swayed by the advice to tell about some passion or passionate incident and miss also showing the more important attributes the colleges seek.)
“There are ways to write about activism, even “just” protesting or sitting in, that are not at all negative.” Absolutely. The challenge is this: There are ways to write about activism…that are not at all impressive, either.
If OP tells more, we can suggest more.
If I were reading her app, I’d wonder if she truly is a person concerned with the rights and dignity of others the sort who rolls up her sleeves, takes on challenges and does some good around her. Or is this a one-shot deal? Or even just a outburst? I’d be checking her ECs. Show, not just tell.
Nothing wrong at all with having a protester spirit. Not even right now. Lots of activated kids take on worthy causes. The top colleges like that spirit and energy. But the higher the college tier, the more this needs to be more than just telling a tale of one time.