It's hard for me to express it clearly but you description doesn't seem to include an overwhelming sense that being in any kind of relationship like that MUST also mean a exclusivity of intimacy. Complete with paranoia over whether you will ever violate this hard line and become a cheater.

And I'm not against some people wanting that. I'm against that being the default understanding for almost all sexual relationships, even when the sexuality part dies and then you become a prisoner of the relationship, torn between convenience of staying together and being sexually unfulfilled, forever.

Not to mention all the policing that comes around hunting violators of these pacts. And worse, the societal skewing pushing everyone into these exclusivity arrangements. Where I work, just 20 years ago it was well known that married people favored each other and the promotion were far more likely for married than the celibates. There are often many other forms of incentives, a lot of them financial, disfavorable toward celibates.

These types of arrangement used to be inescapable literally, to the point of many killing their spouses and elites having wars over the right to escape, and still we barely are able to escape the oppressive institution and its demands.