From the article : "It's been said that ideas don't matter, execution does. I wholeheartedly disagree. You need both to succeed, but you can only get so good at execution. A great idea gives you much more leverage."

I think it underestimates execution. A great execution makes the dumbest ideas succeed. Reminds me of 'potatoparcel.com'. The business is solely focused on mailing potatoes, which sounds ridiculous, but it found its place.