Now, a word from Mark Twain

The best swordsman in the world doesn’t need to fear the second best swordsman in the world; no, the person for him to be afraid of is some ignorant antagonist who has never had a sword in his hand before; he doesn’t do the thing he ought to do, and so, the expert isn’t prepared for him;he does the thing he ought not to do and often it catches the expert out and ends him on the spot.

I know it's true in poker. I suspect it's true in business.