Maybe I'm weird, but I see an intrinsically American nobility in the idea of a man busting his ass at the only thing he's ever been good at, something he can do better than 99.9% of the world, so that he can earn enough money so that his children and grandchildren will be able to have the choices he never did.
I think the whole "for the love of the game" notion that's been driven into our heads by decades of sports media is nice and all, but at the end of the day, it's sort of a silly construct when compared to the real-life humanity of the desire to realize the American Dream of rags to riches.
And make no mistake: the poverty that many of the NFL's players come from is very, very real. If anything, it's "underblown" by the media. Sure, we might here about Je'Rod Cherry raffling his superbowl ring in some slow Saturday's sports section, and we might here some nice stories on the occasional OTL episode, but we're not bombarded by it every day like we are with the excesses of the Pacman Joneses, the Mike Vicks, and yes, the Ty Laws of the NFL. It's they who are the noisy flashy exceptions, and not the rule.
Why don't you take a moment and look into the work that Bill Belichick has done with Jim Brown's organization. Now there's a man (BB) who knows the kind of world so many of his players come from, and how many more of them never make it out of.