You have a point about the FAA's handling of potentially safety-enhancing new technology, but that is not the issue here. Its safety concerns were verified by e

You have a point about the FAA's handling of potentially safety-enhancing new technology, but that is not the issue here. Its safety concerns were verified by events after the compromise was put into effect (and the absence of any accidents as a consequence is not a counter-argument.) The root cause of this problem is, to an extent, a problem of agency silos. The FCC exercised its responsibility for controlling radio interference almost entirely by regulating what equipment can transmit, but radar altimeters are now giving false readings because they are overly sensitive to signals they receive outside of their allotted bands. While this may formally be part of the FCC's responsibility, it is clearly something the FAA could have been more concerned about.