Better yet they can be disabled temporarily since presumably the same proof can be shown to the relevant regulators, airline HQ, etc…
They aren’t automatons that must obey every single system installed in the plane regardless of how absurd the outputs are.
Besides, it is hard to determine when and where jamming will happen, and it can start and stop at any time. Imagine a truck driver trying to bypass their company tracking using a small jammer, and driving down the coastal highway near SFO. Any planes coming in for landing might lose GPS or even worse, get inaccurate results, but only for a moment or two. Is that a problem? It depends on exactly what the plane is doing in that moment and whether everything else is going right.
(Ops Group is a professional group for international pilots, flight planners, or, as they say, people who have a callsign or answer the phone "Ops".)