The franchise can't attract the most beautiful women. Those women are already taken. It attracts women who are a little bit over the hill, and/or women who can't quite get a foot in the door into the entertainment industry. The show is also attracting a lot of single moms now as well. It's becoming so commonplace no one even mentions it or brings it up.
Angela Amezcua is an example of several of the above. She's a single mom, late 20's, and still signed to a modeling agency, even though the top models begin their careers in their teens. She's a beautiful woman, I'm glad she was on the show, but she's a career first girl, trying to enter several professions at 29 when those industry's 'stars' are groomed starting as children. Not exactly the traits you're looking for when searching for a wifey.
The franchise simply can't attract young, beautiful single women who aren't divorced or who don't have kids. The reasons why are simple: the show doesn't even pay it's contestants/actors! Second, they often portray them in a humiliating fashion, or in a less than sympathetic light. If Juan Pablo's claims are accurate, the show's producers are even forcing it's 'actors'/contestants to take part in softcore porn (such as the 'nude' 'sex scene' on the beach).
Honestly, no man will prefer a 30 year old woman who's been divorced and is raising a child on her own vs. a 20 year old woman who's never had a child and never been married. These women simply have too many miles on the odometer: they're burned out, cynical, and are clinging to their last and best shot at stardom. Everyone on the show knows that they have a zero percent chance of becoming a steadily working (and paid) actor or model, but maybe they can schmaltz it up enough on screen to earn a return gig as bachelor or bachelorette or as a contestant on dancing with the stars. Before they return to whatever it is that they were doing before (social media influencer, software salesperson, hairdresser, etc.). Being on tv sure beats whatever it is they're on vacation from, I suppose.
As far as the men, they're looking for a quick jump in the sack from a pre-selected group of hot women (hotter than what they'd find in an online dating site or at the local watering hole, that's for sure).
I've gotten addicted to the hot women but if they keep casting older, less attractive women where's the buy-in?