Whether it is this or tracking/disallowing firearms purchases, the payment processors should not be making editorial decisions on legal commerce.
If the item or service is legal in the jurisdiction, the payment processors should be on the hook for agnostically allowing the transactions. Period.
In most companies L1 Support are severely underpaid offshore, total muppets, or both. Their most frequent triage or escalation path is gonna be "I routed it to the wrong application team because the caller said some words that sounded vaguely relevant to something that team works on".