Services already exist for someone to take dating photos. When men are out with their buddies they generally don't think about taking photos of themselves.

A lot of men aren't really built to stand there trying to look pretty for a camera. They'd prefer to show their attraction by doing things. and showing off their competence. That's why so many take photos of fish they've caught and so on.

The format of online dating just isn't a particularly good format for men to show their attractiveness to women. There's no body language, no eye-contact, no touches on the arm and so on.

Men find women in still photos highly attractive. Men in still photos? Meh, not really pushing women's buttons very much unless they're extra attractive.