"If you are running a website that is the biggest site on the internet running that framework though you should have an inside-out understanding of the technology you are using."

Well, I bet that's true now.. Or will be..

But I can't imagine anyone not building or releasing a Web app until they have an inside-out understanding of the technology.

Assuming they have some means to monetize their traffic, they can now go hire someone to fix a problem most people wish they had.