That's not a good analogy. Mostly shows you don't understand the problem being solved.
It's not "faking" an analog system within a digital system. (If anything, that's what a full digital DJ set up is.) It's an adapter between the two.
As such a purist, would you prefer that digital music is never used? Or that digital music must only be used with digital controller? In that case DJs that use both types of music have to lug around two separate controllers.
