In 1913 one Sicilian brother immigrates to NYC, another to Buenos Aires.
Both raise families and their offspring always married within the Italian ethny.
102 years later, a BA cousin immigrates to NYC and moves in with one of his distant cousins.
The BA cousin, despite identical ancestry and appearance, is considered Hispanic and eligible for all the perks, while his NYC cousin is simply a boring old white guy.
Now you know why the category is “Hispanic” and not “Latin”. Latin covers a whole broader spectrum, including most Italian, some French and a few Romanians.