Assuming it's a strong/clean enough RF signal and they aren't using any countermeasures, sure.

The point is not "this will work in every scenario".

The point is "this will work in some scenarios".

I'm not saying it can't work.

My point is that it's unimpressive because it won't work very well for the types of targets that they are intending it for (air gapped systems usually have a lot of other countermeasures as part of their system, especially targeting unknown RF sources).