The late Justin Wilson was asked when he came over to IndyCar from F1 why he made the move Stateside; his answer was simply, "I want to win races, not finish middle of the pack."
To many North American fans, that statement rings very true; unlike Indycar, where while we have dominant teams such as Penske & Ganassi, any team on the grid can win (and has - among them: Ed Carpenter Racing, Arrow-McLaren, A.J. Foyt Racing, Rahal-Letterman-Lanigan and Dale Coyne Racing, etc.) whereas in F1 up until a few years ago it was basically "the Lewis Hamilton Show" (with all due respect to the man).
To F1, North America is like a Crown Colony - a place to pillage, steal and plunder from...and if we can snatch a native back to our lands, all the better to them.
To us, though, Formula 1 is akin to a den of thieves, whores, ne'er-do-wells, cowards and scurvy dogs, a place that makes the Mos Eisley Cantina look like a family-friendly place to vist.