That's my understanding of why it's so common too.

Though I suppose there's some reason for concern, if you're really opposed to the concept of it. I view it sorta on the same spectrum as things like 'facials' and how wildly popular those have seemingly become -- a filming norm from a long time ago that mostly aimed to show/prove that the guy had cum, turns into something people do regularly because they'd seen it so much in porn. Same for things like anal, or many of the more mainstream fetishes/content -- it becomes largely normalized by its prevalence in porn.

Sorta like how that Dingus guy, Mayor in Ohio, got caught sniffing his step daughters panties. Dude prolly thought it'd be the start of a raunchy good time, where she catches him and then admits her lust for his old flabby limp dick dad bod.