Why do people feel it’s ok to comment on someone’s acne?

I had horrific hormonal acne in my early to mid twenties that could only be cleared up with medications prescribed from a dermatologist and an ointment you can’t get over the counter or from a drug store.
It was that bad. And makeup artists would comment on my skin and how much acne I have which was so rude.
Then my therapist at the time asked if it’s an issue with my hygiene.
People are so insensitive.

Why do people feel it’s ok to comment on someone’s acne?
Post Opinion