Women have a dualistic sexual strategy that is biologically ingrained.
you are going to have to re-design the entire paradigm of relationships. I don’t believe that a relationship with healthy sex and daily intimacy and respect is possible in the existing frame. It’s an unworkable fallacy. It’s the wrong model. It’s a social construct
I think that's a bleak outlook on relationships. Which are, admittedly, impossible to keep fresh over a longer period of time --if by "healthy" sex, you mean "exciting" "hot" etc. then yes, that cannot be maintained over a long period of time, as
all human beings are biologically polygamous. Men, moreso than women, are more excited by sexual variety.
If we're going with the Rational Male's position of dual female mating strategy, than the straightforward solution is to satisfy both sides by being a blend of 'alpha' and 'beta.' It's possible to maintain her respect for you as a man, while offering her the intimacy and emotional validation she needs, and maintaining a sex life -- though that sex life isn't going to be hot bl0wj0bs in a nightclub bathroom from your wife of 15 years.
The other thing to keep in mind is that we all eventually age, shrivel, and die. So, regardless of what you mean by "healthy sex" -- that ends too. Whether by monotony or the organic degradation and decay of our bodies, sex with a monogamous partner inevitably becomes less interesting. That's the price we pay for emotional intimacy and security with a partner -- the sex, while frequent and readily available, is less and less interesting.
But for many, that's a price worth paying. As John Mellencamp wrote, "life goes on, long after the thrill of living is gone." Once your d!ck stops working, and it will, do you still want to be single? Almost no one does.