Well context matters.
If I'm going grocery shopping and a grown man laughs at my girl, then ya, I'll confront him about it as it would be disrespectful.
But if I'm attending a show with many friends, colleagues, peers, an award show where presenters/hosts have a longstanding history of cracking daggers, and an acquaintance/friend of mine throws a little shade my girl's way then no....I'm not going to take this personal. They do it at the Oscars, emmys, grammys, heck...even the freaking Espys.
Let's be clear here, the joke was not insulting. He referenced GI Jane, who btw is this bad ass soldier who had to fight and prove that women can be just as good of soldiers as men. She literally is fighting for the entire female gender in military and comes out on top. So if a little comparison to her shaved haircut is what is oh-so-disrespectful then what about all the other jokes like....Rebel Wilson saying ''Will Smith did great in King Richard but his best performance is being okay with all of his wife's boyfriends''??..or what about all the Ricky Gervais jokes??..
Some need to loosen up a bit.
And for real, we're talking about hair loss here...not f***ing cancer, not aids, not some paralysis. Yes, I know how important it is, but this isn't some life threatening or debilitating disease. JPS also has publicly been speaking about this for years and has embraced her reality. She also still looks quite good in her shaved head.
At worst this is a bad joke, or in poor taste, but very disrespectful?? Hell no, he didn't call her ugly or sick.