Actually I would not say that PvP the main point is at all, it's about survival.
At least in my interpretation of what I read from the Devs is that the environment is your main enemy, which you will need to survive, we'll find out if that's by hunting animals (which is indeed way too easy currently and will get much more challenging when all the military grade weapons are gone) or by gathering&planting at a later development stage.
The multiplayer aspect is supposed to give the game the thrill of not knowing what happens and the interactions with other players are essential for survival, teaming up should therefore not only bring protection from other players as many assume but help with survival against nature.
Personally I don't yet see this happening when I look at the community that already exists, half the criticism is beaten down with crap like "if you can't cope with it play hello kitty!" so it all comes down to the server communities and management, which can be a pain for whoever is hosting.
What Tsyolin said about the situation where you have everything and there is no way to continue without adding the motion of having to raid other people, I think is not how the game will be, because if it indeed would get that way, the larger part of the people would just stop playing it.
This is what you can see happening on many servers as this condition does apply in the current state of the game.
Alternatively to this "inevitable" outcome of crazed raiding where everyone becomes automatically a bandit, there could be increased rebuilding of the civilization with trade and complex crafting besides the fights between players. For sure that would open a lot of doors and fun for players, instead of beeing forced to hunter other people...
Also the survival could be made more difficult with the addition of more post-apocaliptic scenarios like earthquakes or heavy storms that can damage everything that is not built well enough...
There are in fact loads of ideas that exist to make this game one of the best in years, the PvP focus would just kill it without all the other aspects beeing diverse.
Edit: ...as a good example of statements made here is the post just previous to mine...
I'm not sure how you interpreted the game description as not involving PvP. Or that it isn't even the primary focus, but simply put...you're wrong. Garry and the other devs have repeatedly made statements that make player interaction and freedom of those interactions to be the primary threats in the game. The goal is to survive, but this survival isn't environment exclusive. It is all inclusive, but the players will always be a bigger threat than anything they put into the game because players aren't scripted.
The focus of the game is that you should be fearful. If you aren't fearful of getting shot at because you're on a non-friendly fire server; or fearful of being raided because you're on a modded server with no explosives; you should at least be fearful of stupidity, because
it's you're own fault for letting that guy into your base that you jus met, or leaving your storage boxes out in the open without putting a door on your shelter.