Anthropologists studied many cultures that have no concept of monogamy and sexual shame: it's quite the opposite.
The strongest stallions getting all the women while everyone else is stuck with their VR girlfriends. Totally not a thing on a global scale because we are getting more and more. No, don't cite me aging population stats. They may be real but the math doesn't work out with your 30%
Sounds like someone in the 30% doesn't know how the rest of us live...
It seems to me these ideologies are just an attempt to make sense of the suffering.
One of my son's friends fell under the spell of an incel preacher who goes as "Wheat Waffles". He refuses to hang out with my son because my son is taller and more handsome and thus inevitably "mogs" him.
Waffles is running a pernicious cult complete with a catechism and what I saw looks a lot like Scientology disconnection.
Those of us with the right combination of desirable traits have a choice of partners, scheduling a few dates a week with attractive women is no big deal if you're in that group. Conversely, my friends without such a combination struggle to get a date at all even if they trying to date "down" or "at their level" (I recognize these are crude terms, not sure how else to express the idea). Most of these men are pleasant and have decent jobs but they appear to fall below some line where they're considered for dating unless things evolve very naturally within a longer platonic relationship.
There are many young people today who believe there is also an inequality of attractiveness at work which is, I think, a newer concern.