There's a large set of developers for whom this statement is really the end-all of their existence:

"If it's not complex, it couldn't possibly scale"

If you want to see an example, look no further than this post from Debu Panda - who argues that you really need the full J2EE stack to build an enterprise website (never mind the complete lack of evidence). Lesscode does an admirable job of taking him down a few notches in the comments - this post in particular is worth reading.