Except...they're not true monsters but only perceived as such in SNW.If the Gorn were true “monsters” as in Goldsman’s vision, they wouldn’t give a shit about pleading their case for how their territory had been violated in “Arena.” Why make the claim to Kirk if they’re just vicious and “all appetite and instinct” towards their prey? They wouldn’t give a shit in that moment about explaining its rationale unless the rationale has some merit.
We only have our characters perspective to go on. A perspective which may shift with more information.
Also, I love the idea that the Gorn should just be taken at its word, even though we have no evidence to the contrary as well as the fact that the savagery of their attack and lulling the Enterprise to take away the area's protection.