Not 100% sure if you're being sarcastic or not, but there are two legit use cases:

1) Design on desktop, but publish for playing on mobile phones/tablets.

2) Design on iPad/tablet with connected keyboard. Play on tablet/phone with or without keyboard. (A phone would probably be too small for the Wick editor, but I can see it being useable on a larger touchscreen.)

To put this in clearer terms, there's a huge difference between building a model ship on your desk, and building a model ship in a bottle on your desk.

Putting a well-instrumented usable UI together is hard enough without scope creep including doing a UI that's also useable on a phone.

I agree that editing on a small screen-sized phone would be silly. But targeting phones for playback of Wick-created content would be a worthy goal. Also a worthy goal would be making the editor work on tablets if the screen was big enough (iPad, iPad Pro, etc.).