Yes, but interaction with other players doesn't necessary mean Player Vs Player. Those interactions would be and are mostly for me anyway, PWP - Player With Player. There are several interactions which can take place between players who are instanced with each other, only one of them is PVP.
Yep... agreed. The v in PvP is for "versus" which implies oppositional behaviour but the game design was done with "primarilly coop and rare & meaningful PvP and community controlled griefing" in mind (which is why the game doesn't work well as a primarilly PvP one).