I fall into the caregiver bucket, and I'll present an argument I was hearing a lot on linkedin and those kinda places in favor of RTO: Some companies and bosses think that if you're on the clock you shouldn't be taking care of your family.
The reality is a lot more complicated. WFH means I can spend 20 minutes resolving a problem that would've taken me half a day before - driving home, resolving the issue, driving back, finding parking, getting back into the right mindset to do work, etc.
It also means I can join meetings that I otherwise wouldn't have been able to join. (like in your example, the coworker feeding their parents). Admittedly your coworker should probably invest in a mute button lol.
Anyway, yea, WFH is a huge enabler! But I guess some people are kinda ableist/unfair about it.
It's silly. Life goes on. We shouldn't be playing this game of competing on how hard we can lick boots.