Well they do live in a world with enormous and dangerous wildlife, poaching can and WILL end up creating a pissed off rathalos that wants to burn houses. Humans and other human flavors
aren't that much of a top dog in MH remember that the player is the exception during the games
, so pissing off the wild when your neighbor is a fucking elephant at the smallest is a bad idea.
Those fucking monsters are smart too, like that one pukei. No reason to aggressively take more than you need from them. Even the cats count as monsters but they're partners. Also in most games the most hunted monsters are always the aggressive invasive assholes that have no reason to be there.
In Tri the MC almost had his hunter license revoked for disobeying a direct order to GTFO of the village and let Ceadeus do his thing until a proper group comes in. Xeno being KILL ON SITE in World is pretty obvious too.