I agree balance is part of game health but I do not think game health is singlehandedly determined by balance. I expect folks will make ridiculous claims no matter what, but if the gameplay boards started discussing gameplay in terms of what they feel is healthy it would paint a better picture of what issues are and be easier to help others in the community. Might just be my opinion, i'd rather see a thread like " I struggle/dislike X" vs "X IS IMBA WTF NERF."
I think having to explain where your coming from require more though then trying to slant Numbers like WR or exaggerate values in a kit by listing best case on paper or acting like lanes are always won and some one magical gets full build.
My opinion is some things will be unhealthy even if balanced and it would feel more honest around here if folks open with their Bias and viewpoints rather then try and play them off as a game design buzzword and behave like its a undeniable fact.
So I think moving the goal post would make that easier and more accessible. Its a bit wider and folks have more freedom to express personal views with out demanding the people who disagree need to treat it like a fact rather then an opinion which commonly happens in "Balance" discussions.
Semantics I suppose but as some one who chronically miscommunicates I feel there is a real value in proper usage of language.