Photos of yourself at a younger age and in comical ("cute") situations may be quite embarrassing for your more grown-up self. Especially if people who know you but are not your friends would discover them and use them to publicly make fun of you.

Such photos are not public by default, and should stay private to you and the circle of your friends and relatives.

You sound like a teenager. Adults aren't embarrassed by their family.

But your kids are teenagers at some point, that's exactly what he was getting at.

Being a teenager is very, very temporary.

Well, it's middle school + high school + likely the freshman year in a college. The time to make some key decisions, socialization choices, etc. Being severely embarassed in the process could reflect pretty badly on that.

Being bullied as a teenager can have long term detrimental effects.

but the scars formed are forever