Actually, I spent plenty of time leveling it through other avenues as well; while I do admit, I really did power-level it through Ocean Fishing so I could get the EW Beast Tribe unlocked, I also spent plenty of time doing the quests, as well as just running around to random spots and just fishing for whatever. It's actually really cathartic, funnily enough; there's something that I really just kinda enjoy about wandering around, sitting down and engaging in a small mini-game while taking in the sights.