This is the type of thing that law firms will send without consulting their client first as soon as they were made aware as a default response, without considering any context to verify proper action. Which in most cases would be fine, but in this particular genre, because of shitty companies like Nintendo, can cause direct reputational harm.
It is Wizards of the Coast though, historically they're not much better, so this would be 100% believable coming from them on purpose.
I don't understand how it's so popular in border specifically. Like Taco Bell I understand, that's not Mexican food, they don't claim to be Mexican food, it's gringo food, half the people I see at Taco Bell are Hispanic because that's a specific type of food different from everything else... But there's a Mexican place of some kind on nearly every corner in AZ. There's no reason to ever even consider Chipotle.