Why does anyone still care about eavesdropping on mobile networks? How come it is still not 100% universally acknowledged that the network is hostile and carrie

Why does anyone still care about eavesdropping on mobile networks? How come it is still not 100% universally acknowledged that the network is hostile and carriers should not be treated as anything but a dumb pipe for IP over which you have your own security on the application layer? Maybe carriers should just straight up declare regular phone calls as non-private and start publishing all recordings of literally everyone's calls ever straight to their website. Seems like we need that kind of nuclear option to finally destroy the remaining false sense of security in the plain old telephone system.