Tbf relationships are transactionary, in the sense that both parties get something out of it. Though, of course that’s not the entire picture. People are more complicated than that. Personally I think it’s more so to do with protecting yourself from harm. Putting the burden of ending a relationship on the other person to protect yourself from having to feel that. Haha good times had by all 🙃

The boy being stopped by a girl's brother who says "my sister doesn't want to talk to you anymore, leave" is a tale as old as time

It's not Capitalism. We are literally wired to see other people as objects. "Transactional" relationships are just what makes people the happiest on aggregate. The people who complain are cishet men who had a pretty good tyranny going for a long time.