The funny thing is that I thought the same thing, and I'm not even joking. It would also mean that they would have to make an RPG where your only way of advancing your character and improving your skills did not mean killing other people.
Open world, centred around a small Canadian fishing village, with drama and romances and fishing and beautiful vistas. Gain experience by hauling bigger and better fish, upgrade your boat and your crew, combat deadly weather and explore the sea to find the good spots. The village could be almost adventure like, with relationship based 'quests'.
I think it could be a fantastic game.