I did for a while. Mostly fun one-offs for popups and events rather than practical applications. Once I got a taste for it I tried seeking a career in it but there's just very few places doing it and I wasn't able to get my foot in the door. The market exists but it's small.

I can also tell you it's really not rocket science. We built UIs the same way we build anything else. A lot were just web pages with a machine locked in Chrome kiosk mode. Some were Electron or Unity if we needed razzle dazzle. You can get all kinds of off-the-shelf devices control lighting or read input from all kinds of sensors that just go in a USB port. You can rig stuff with microcontrollers but for a commerical project, you can buy bulk devices purpose-built for whatever task.