It might be very humiliating to a woman to lose her hair - or to a husband who has watched her go through that. (There are plenty of married people who have chosen to go their own ways while remaining married for various reasons. I may not approve of every case or in publicizing it; but in many instances they still retain a lot of affection for one another.)
She’s talked about her hair loss publicly for a long time. I’m sure most women would find it as devastating as she did.
To her credit, most women would probably wear a wig; but she just owns it.
And you’re correct - it was tacky and not funny.
If she is humiliated by a medical condition that could be covered up, but not adultery perhaps she should reconsider her priorities, both here and the thereafter. I will also point out she led another person to commit adultery so it isn’t just between her and her husband. It also impacts both hers, and the other person’s children as well.