" Let's make a PvE world where you don't even need to build palisades or walls anymore"
Ever stepped out of your cabin before pali was built to find an adder at your feet? Ever stumbled on a bear and can't outrun it? (For a bit more reality, bears could spawn in caves.) In a PVE world dangerous animals could be made more powerful so there's a greater chance of you being killed than just KO'd. The main difference in a PvE world vs PvP world is you know which animals are dangerous so if you are careful you can avoid them; but you've no idea which players are dangerous so you avoid all of them. Which severely inhibits any possible social aspect of the game.
