Yes, exactly. We can’t assume anything about Keith’s health and eating habits. We can absolutely express concern, but jumping to the conclusion he has an eating disorder is unfair and harsh. Even if it’s ultimately revealed as true, it’s still judgmental and cruel to speculate and then perpetuate harmful gossip. It’s his private business.
For what it’s worth, my husband has an insane metabolism: in high school, he’d reached his adult height of 6’4” but struggled to be even 150lbs. In college, he was ~160lbs. It wasn’t until his late 40s that he reached what is considered a “healthy” weight for his size, despite eating everything in sight (totally not fair, I gotta say). He had a doctor speculating he was anorexic when he was in high school, which mortified and embarrassed him … nope, he just had the metabolism of a hummingbird on speed.
I can’t speculate that’s the case with Keith any more than I can speculate he has an eating disorder. The ultimate truth is we don’t know. We are concerned, but we don’t know, and it’s such a private issue (either way) it isn’t remotely our place to draw conclusions.