All RPG player archetypes are valid when they fit with the overall play style of the group.
Whole group is meta gaming together? Positive collective experience. Whole group is hardcore RP? Awesomesauce.
One jackass is meta gaming in an RP group and pissing them off? Trade off that player ASAP.
This is the best take I’ve seen yet, with the benefit that it’s literally already been done.
It’d be interesting to see what would happen if they tried to mandate this now, but I’m sure it’s already too late.