This game needs PvP, and Yoshida explains why.

[eyloi]

PvP also grants developers time to continue working on large updates. I'm not a fan of it, but I understand that PvP is a must for every online game these days.

[Alhanelem]

PvP also grants developers time to continue working on large updates

It does, all the more reason it needs to come but soon. It is a great way to keep people playing when they've exhausted other content.

I wish I could attack everyone in open-world even fisher, miner or crafter. It would be such fun to run around and pk some random gatherer or low lvl disciple of war or magic out there.
Those kills could raise your pvp points or something.

I hope they will add open world pvp one day.

they will never, ever do this. I could only see a slight possibility of a designated PvP server where open pvp is allowed, but with the current lore of the game, open PvP just doesn't make sense because the city states are not at war with each other.