It's just a vinyl interface to a digital set up. The alternative (when using digital music) is a digital controller which also tries to mimic vinyl, just more poorly.
It's not for people who wanna play at being a vinyl DJ (there are digital control surfaces for that), it's for people who are vinyl DJs and have all that stuff and are used to using it but who would also like to occasionally dip into a larger record bag when at a show.
[1] https://driving.ca/column/motor-mouth/toyota-stickshift-ev-m...
This may be a better explainer than the article: https://www.youtube.com/watch?v=d7OgQJ2r0RI
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.