I think would be a lovely idea, and as someone who has spent a fair amount of time in clothing optional spaces, I can say that tends to be the outlook there - both on the bodies and the other just human aspects. The problems rests with the fact that the entire rest of our culture is built around a dominance-based hierarchy, where someone has to "lose" in order for someone else to "win" or gain a rung on the ladder of power and prestige. Exhorting people to constantly compare themselves to those around them drives capitalism - because then you can sell them things to improve their appearance, to impress the neighbors, etc. So, there's a lot of cultural things to untangle in order for most people to be able to more fully embrace "let's just be good to each other and recognize that we are all human."