Neither would you in Guild Wars. Outposts had a 64 player limit, IIRC? Instances, 8 to 16 players, mostly 8 to 12 in later campaigns. Outposts were very much assembly points to form parties and play instanced campaigns.
Stats and player progression were persistent, the world wasn't.
So Yeah, it's Guild Wars with guns. I miss that game...
In Guild Wars 2, you see a lot more than 64 players running about in the zones. Destiny is mulitplayer online but lets not kid anyone, an MMO it is not, it just doesnt have the player numbers to constitute the Massively portion of MMO. Anyone expecting to go into the game thinking its an MMO with hundreds of players onscreen in the game areas would end up being disappointed so I'm not going to mislead them into what to expect.