People who have tinnitus sometimes commit suicide because of an intermittent high-pitched whine that won’t go away and non-stop sounds are also used as torture. but imagine that being your whole life except it’s a waterfall that also makes everything always damp and is dangerous to navigate around. Not to mention the literal infant who can’t conceptualize sound seeking claw trolls and instead would be subjected to the thunderous roar of a waterfall 24/7.

Beyond that, building anything even semi-permanent near the waterfall would probably require them to ya know walk around on twigs and leafs, they would also live farther from their main source of food, they would no longer have electricity, and all of that building would take so much time that they’re more like to run into a monster. It might even require materials they literally don’t have or can’t get. How are you gonna build a log cabin if you can’t chop wood?