First off, as I former cancer patient, I want to point out I take absolutely NO offense to what KG said. He said absolutely nothing offensive. It's about as offensive as saying the refs are blind (which is said all the time). Is that offensive to all blind people?
And while technically what Villanueva has is a disease, it's harmless. The only thing that disease causes is hair loss. It is as harmful of a disease as color blindness or male pattern baldness. Villanueva is a 20-something year old multimillionaire. Is he still sensitive about it? I mean if KG said this to a little kid, ok that's insensitive, to an adult, not so much. If KG (who shaves is head, maybe balding?) said that to someone who is suffering from male pattern baldness (which is labeled as alopecia the same disease family as alopecia universalis which is what Villanueva has) would it still be so insensitive? Both are technically diseases.