Intrude, perhaps this is accurate and I can see the reasoning behind this.... however, this game in its current state has cross-play across this figurative boundary. Plenty of PvE content in PvP zones, plenty of reasons for PvPers to PvE in order to achieve better performance (accolades, IOs, etc.). Heck, PvP IO sets add additional bonuses while players are PvPing (though the dreaded diminishing returns of PvP shreds these bonuses in to oblivion lol)
I think it is a nice balance where it is right now and there hasn't been a compelling reason to rock this boat.