While it's probably true that the right attitude can help one go a long way in any pursuit, there is a lot more to being a successful sports bettor than only attitude.
IF attitude were the one and only ingredient, as you claim, then Vegas Dave would have made a lot money betting on sports. But he didn't. And these days, he's probably jerking off to photos of Mr. Belding and Joe E. Tata while professionals like myself are dining on shellfish.
BAUS