There is nothing 'dumb' about DNS. It is a 'sophisticated software to translate human readable addresses to machine-understandable and infinitely routable identifiers'.
Anything can be reduced down to 'dumb' if you try hard enough. Officer, these are just chemicals in a specific quantity and just goes boom when mixed together.
You missed the point spectacularly. “Dumb pipes” doesn’t denigrate DNS, it means that DNS doesn’t make judgment calls, there is no intelligence making decisions about where and whether to route things.
It's as clever as a phonebook. Better now?