I'd imagine it that way.
I think the old timers would boil it into a soup/stew to make the food stretch, and maybe help the flavor? Not just throw it on the grill like a steak.
Soaking in a salt water/baking soda solution overnight gets rid of the gameyness in a lot of other wild things.
I have had smoked raccoon before, also greasy like you describe.
I had a coworker that talked about how great possum belly stew was etc etc
My attitude towards possum is the same as chitterlings. I don’t eat what shit passed through.
almost