Literally, exposing these facts about Vance would absolutely shatter his "avenging angel for the working class" schtick; it would expose him for the bootlicking housepet he actually is. It would utterly defang him in the eyes of the labor class and render him less than irrelevant in the discourse.
But nobody is gonna say it, because to do so you'd have to admit that class war exists and poverty isn't about LABOR class choices but rather a byproduct of functioning capitalism.