Because mercenaries are such a valued group of people in the United States.
Oddly I remember learning about the Hessians when I was a kid in 1950’s America and we weren’t taught that they were good guys.
Maybe Prince needs to rent himself out to the Mafia, they’re fond of contract killers.
The only Hessians who were mercenaries were the ones who defected and fought for the Colonials.