I'd like to add to that - the Western Continent is mostly made of BOTH Lizardfolk and humans (plus elves way up top). Plus we've seen what appear to be Kobold communities that interact with other groups (at least something in Cliffport if we assume Mr. You Killed My Father was recruited there like Pompey), and I believe some other monsters interacting with humans/demihumans positively. It isn't just goblinoids, Trolls in particular seem to not interact with humans much based on Serini's conversation with Lien, but goblins having a lack of other races to interact with is a big issue for their own equity.