Out of the HoF RB's, I don't see anyone in that list who ever spouted anything as selfish as "For who? For what?" and deliberately refusing to catch a pass out of fear of contact.
Even when their teams were badly behind in losing games, they'd still give it their all. Even when they were disgruntled with their situations, they still gave it 100%. Eric Dickerson, for example, was on some pretty shitty Colts teams, and still went above and beyond the call of duty during many a hopeless game.