A lot of the men who become successful with TRP aren't actually physically unnattractive, but are men who increased the ratio of their existing purely sexual value to their romantic value and hid or erroded the traits that make them great all-around life partners.

This creates a sense of safety for women because they can enjoy the sex without feeling like he will be close enough to them emotionally to hurt them or that by not wanting to be with him either, him only wanting a fling will not feel as much like rejection.

This is referring to women who have casual sex for pleasure and not as a lure for commitment. Those women are similar to the inverse of beta orbiters.

The inverse would be how attractive women may find it hard to have mutually platonic male friends (who are not beta orbiters). To be that close to someone and have your advances rejected is painful, but from a distance you can count it off as they don't know you well enough. Similarly, if a woman wants a relationship, or just sex, it is painful to only sleep with a guy she would be willing to have a relationship with.