There is a famous quote from Churchill, which goes something like this, he who is not a liberal is his youth has no heart, he who is not a conservative in his maturity has no brain! OR something like that.
As @iwannabe_Brown said , graduate school is not the same. BTW, doesn’t Brown have a reputation for liberal diversity? Maybe OP would add that one to her prospective list.
I was talking about current/recent undergraduate students who are children of friends. They think it is the 60s and will protest any and everything. That is anecdotal. However here is a quick link I found http://www.bluegrasspundit.com/2015/05/left-wing-professor-update-harvard.html
The real and more important point to be made, regardless of which school is that too many students, to avoid seeming cookie cutter reveal information that is better left unsaid. I tried to find the article that I read awhile ago in it AdComs were relaying the worst examples of TMI in admissions essay. One girl apparently wrote how she was so happy to meet some famous professor that while waiting for him to talk to her she could not go to the bathroom and peed on herself!
While a very talented writer can make anything seem like a great topic, including a urinary tract infection, 95% of students will create something that will hit the wrong way. Whether it is an essay about your bi polar disorder, your anorexia, why you only eat white foods, or why money should be replaced with bitcoin, there really is such a thing as over sharing or being controversial without adding anything and perhaps detracting.
Op’s kid should do a draft essay and then run it by some experts in her real life. If it adds to her application great, if it does not, then out it goes or limit it to a few schools.