you could say an MMO has 'PvP content' of which PO has a great deal of and I assume the intention is to discuss the balance between pve and pvp content.
In fact, any Pve content currently implemented into PO eventually pushes you to the beta islands in order to progress (e.g. higher level missions) this means that, even if your a Pve player, you must still learn the rules of PvP in order to survive on the beta island.
Personally I agree with Hemingway, once you start competing directly (as opposed to in-directly) with other human players the predictable patterns of AI becomes mundane.
However a game, no matter how you regard it, is a business which either grows or contracts. (no business truly 'flat-lines', it does either grow or contract no matter the margin) Generally with MMO's the larger customer base are the pve players therefore it makes sense to implement additional Pve content to attract those customers
Pvp can get stressful by its very nature, so I'm a firm believer that any pvp mmo must have its pve outlets, to relax and regenerate the nerves.
i look forward to seeing if PO continues to push its player base to the pvp 'beta islands' or if it strikes a balance between the two.