He's putting himself out for public consumption. No one is being mean by pointing out that he's gained weight since the pandemic. So have a lot of people.
I used to weigh over 300 lbs. I worked my ass off, literally, to get into the best shape of my life in my mid-40s. But when I was at my heaviest, I wouldn't have expected people to pretend I wasn't that big.
I mean, if people are happy with that kind of lifestyle, there's only so much one can say, but I agree, normalizing it is a bad way to go.