I would seriously hope that modern therapists would do their utmost to push back on any idea of virginity as an indicator of human value - an idea that comes from the idea of women as property and successor machines.
a) You are conflating rape with sex. Why would being raped be the same thing, at all?
b) Everyone I've seen talk about this has been referring to charts showing increased non-marital partners correlates to divorce, but you are talking about pre-marital partners, where divorce rates actually start going down after a few partners.
Maybe in the same way that "the more food you try, the less likely you'll stay with Mcdonalds".
Being discerning, honest and moving on if things don't work out is much better than the alternative, for everyone involved.