The Role-Play Realm is the ultimate litmus test for whether a person is capable of self-governing.
When you aren’t interested in Role-Play, picking a normal realm instead of a Role-Play one is an easy, convenient task and one which we all recognize as the correct, appropriate thing to do. To not roll on a RP realm as a non-RPer is objectively right. There are no situations other than dire lack of knowledge in which a non-RPer rolls on a RP realm. Simultaneously, it is not illegal to roll on an RP realm as a Non-RPer. Therefore a role-play realm presents itself as the apex example of whether a person will do what is right without being forced to do it. No one will punish you as a non-RPer if you roll on an RP realm, no one will suspend or ban you if you keep playing on it without an interest in RP and you gain nothing from rerolling to another realm. You must not roll on an RP realm as a non-RPer out of the goodness of your own heart. You must not roll on an RP realm as a non-RPer because it is the right thing to do. Because it is correct.
A person who is unable to do this is no better than an animal, an absolute savage who can only be made to do what is right by threatening them with law and the force that stands behind it.
The Role-Play Realm is what determines whether a person is a good or bad member of society.