There are more legitimate reasons. If you are one of the few people who live in a radio quiet zone, or if you suspect 2.4GHz interference with other 2.4GHz radios you use, or if you develop and test RF gear, you'd want to be able to disable the radio.

Hacking used to be about modifying your hardware.

Smart TVs are relatively cheap compared to large industrial displays. They are also reliable. If you need large secure (no wifi) display, this is pefectly valid option.