@Yitra First of all, I was rereading my previous comment and I feel I might've come off as a little too combative, my apologies.
For the most part I agree with you. I do think certain limitations are absolutely fine. But if I look at it from my gameplay perspective - I enjoy full loot PvP. However, the funny side note on that is that I'm absolutely terrible at it and actually prefer to be a crafter and play the economy with the occassional PvP trip with friends.
However, if one world has no (or very limited) PvP which can trade with full loot PvP - how does this balance out? From an economical standpoint it's much better to play on a 'safe' world if where resources are 'easier' to obtain. The balancing act on this seems precarious. If you balance it around more dangerous worlds having better resources (risk vs reward) then effectively you create a tiered resource system where the playerbase who does not want to interact with such a zone will feel obligated to do so anyway (or trade for it, but pay a premium). But if those resources can also be obtained safely there is no reason to take risk, invalidating the playstyle of players who do want to play in a risky environment.
Furthermore, it might force people who want to play optimally into creating alts purely for the sake being able to fully enjoy every aspect of the game.