I’ll admit, my reasons for it hardly qualify as “good” ones - they’re largely between having the option for a fisher over a farmer for early food source, and for story reasons. Oh…and a slightly selfish one that technically is between story and concept.
The former draws from settling in forest areas where there’s water sources high in the mountains, meaning that I can nestle up there without being fussing about berry bushes and other sources of food in lieu of having to be where I can farm.
Which thus would also theoretically suit the Northern Alliance when they come in, especially on the theory that they likely favour the Arctic biome, which doesn’t strike me as place where the Farmer is going to be very useful, but a Fisher might be.
Which loops to the concept-from-story that is the basis of my selfish reason, though one I haven’t touched because anything I’ve managed with it so far really ends up taking from elements of your work; a [Frost] Jotun inspired race.
Based on one I’ve used in some stories of mine, drawing base from Norse mythos and Palladium’s multiverse, the surviving jotun tribes had a reliance on ice fishing for food in their cursed realm.
I briefly was toying with drawing from your Cliffs biome to make an incarnation of Jotunheim as a biome, and the race to go with it with a variant of your Fisher as a substitute of sorts for the Farmer (or a parent class to it).
…unsurprisingly, the best I got was directly clipping elements from your Cliffs biome and from Frostfeast, got discouraged, ruled it beyond my ability, put it back on the shelf. Nevermind trying to figure out a spear-fishing type animation…
But story aspect still weighs in around the same; I favour fishing and hunting over farming for many of my story setups, especially since I’m prone to using existing story characters for the name/appearance/role inspirations for my Hearthlings. I even started cobbling a personal mod to make Cook promote from your Fisher rather than the farmer to supplement it.
…but, well, I’m weird, everyone here should know that by now. So…end rambling wall of text, with my apologies