Look its really fucking simple.
You marry your wife etc not because you want to stay monogamous for the rest of your life.....be in love....blah blah blah.....all that crock of shit the movies have fed you...only beta bitches fall for that shit before they ALL eventually get fucked etc.
You marry her so she can cook, clean the dishes, take the garbage out, do your ironing, make you steak sandwiches in the middle of the night, give your regular blowjobs, take care of your house and kids if you have them etc.
Then you fuck all your little girlfriends on the side like any normal man would and just make sure she doesn't find out about it.
No need for this open relationship bullshit.
You do what the fuck you want, she can't....that's the way a real fucking boss should roll.
Many guys buy into what you outlined in your post.
To me marriage is about being PARTNERS .
It doesn't need to be for life if one of you changes a lot.
My current wife makes a lot more then me and doesn't need to assume the typical domestic drudgery .
We are fortunate to have the means to hire people for most of that stuff.
We prefer a monogamous relationship and don't have any silly delusions.