I mean, you have your answer right there. It’s not like Harvard is a particularly untrustworthy source for diet recommendations.

Why are you doubting the number? If you feel fine and don’t want to change, don’t. Everybody is different and has different needs, and you might just need less, but anyone reputable is going to give the same rough range.

In my opinion, public figures, including celebrities, give a degree of consent implicitly by seeking to be public figures. I dont think that for celebrities that should extend to lewd or objectionable material, but if your behavior has been to seek being a public figure you can’t be upset when people use your likeness in various ways.

For politicians, I would default to “literally everything is protected free speech”, with exceptions relating to things that are definitively false, damaging and unrelated to their public work.
“I have a picture of Elon musk engaging in pedophillia” is all those, and would be justifiably removed. Anything short of that though should be permitted.