I get that this lowers the barrier to entry, but presumably you could do something similar with a software package to make your laptop do the same thing? AFAIK it uses off the shelf radios and firmware so I don’t really understand the framing here that this device is ok but others aren’t. Especially as others point out it’s unlikely this has anything to do with making car theft easier nor to interfere in any way with the safe operation of the plane.
At one point there was an android that did the exact same attack as well. No need for an additional device.