It’s far more complicated than you are stating, in this society where normal marriages don’t last, think that a man can keep two women contempt and accept such a situation. Also the type of polygamy I’m defending is one which has regimented rules.. most men would be disqualified because they would have the means or be able to treat all of them equally. Also there is a 4 wife limit.
1) So, in your mind, only SOME (see: few) men would be let into this prestigious plural marriage club? On top of that, what's the point of a 4 wife cap? If you're going to exist in a society where a man can have multiple wives, what's the point in setting a limit? Who does that help and why would anyone abide by it?
And also, if your requirements are that ONLY certain qualified men are allowed to practice polygamy, what is to stop the wifeless, disenfranchised set from rising up? Hell, what's stopping the affluent men with 4 wives who want a 5th from disobeying such loose doctrine?
2) Your ideal society would be one in which only SOME men are allowed to practice polygamy (to an extent,
of course) and all without any sort of religious doctrine tied to it. How does that work?
3) If it's "far more complicated" that people realize, tf is the point? Why the fukk would ANYONE, let alone a majority of
men people cosign or enforce something that very well may not benefit them at all?