What would be the rationale for it?
Simply because different players like different things. Assuming that balanced tension had been the reigning string set for decades eventually someone would experiment with string gauges, discover what we presently know as standard sets, post about it here, and a bunch of people would follow suit. Some would genuinely like them (I don't know why but they do and that is good enough for them), some would switch to something else when the next new notion comes along, and some would go back to balanced tension realizing that is what they liked. Whatever you like is good for you, it does not have to please anyone else. There is no right or wrong, only what you like. Tension data can be a tool to help you get to what you like quickly.
Ken