Well I don't think having your drone system get paralyzed by relying on wifi is gonna be good for profits. That means they failed on their mission and they lost a load of reputation and have to start over with something better.

Maybe I'm just FPV-brained, but it seems really trivial to make jamming a difficult task even if you only have access to chinese parts, at least in the context of kids. As long as the company doesn't show their cards (control and video frequencies, how it's stored when not in use, fhss patterns (if any), how it connects to the operators) it seems difficult to mess up.