No. Skinny fat and stupid confidence with a workout regiment and a belief you will be the best.
And where exactly that belief has to come from?
So do you believe I can fly an airplane without a pilot licence as long as I am confident?
I believe to tell someone to be "more confident" is not any different than telling him to be "more rich"...sure he can be more rich but only after he works and get cash.
Thats my opinion of course, I dont understand how can you get or even fake to yourself something you have no reason to have.
Unless of course we give a different meaning to the term confidence, I consider it as being sure of being competant in a certain field and secondary being able to master other fields given the previous success in the first one.
If you consider confidence as some kind of abstract idea coming from within without any need for a previous benchmark then I see your points and may agree, surely a guy convinced to be gods chosen will have a greater chance to succeed compared to any of his equal which are still self evaluating before acting.