What a cop out. By that interpretation there's no such thing as beautiful because everyone has their own opinion. But there's a reason the world has "super models".
Yeah, beauty is in the eye of the beholder. But when most of the beholders think the same thing you have the definition of "beautiful."
As you point out, what makes someone a model is whether an advertising executive thinks a particular person will visually appeal to enough people in a target market. If enough advertising executives make the same assessment, that person becomes a supermodel. (Btw, those advertising executives may turn out to be wrong, but only time tells).
Not to get too nerdy here, but what these advertising executives are doing is trying to make an objective analysis (market assessment) premised upon on a large number of subjective assessments by consumers (individual attraction and preference).
So, to put it another way, there is no such objective characteristic as "beauty", but objective analysis of a large number of subjective assessments of beauty is possible.
The problem with the notion of "objective beauty" is that subjective tastes constantly change. Todays beautiful can be tomorrow's ugly, and vice versa. That's why the identities of supermodels constantly change. A trip to any art gallery showing historical paintings of women will confirm this point.
Anyway, RR does nothing for me, but I would bet the farm she works for a substantial number of guys out there, or else someone has made a serious mistake in making her the female face of the sport.
p.s. Try that strip club experiment some time. If nothing else, it's a bit of fun (mixed with a bit of horror)!