Fourthly, even if a generation of kids with a strong anti-authoritarian streak (and who were shocked and appalled by various US administration's behaviour from Guantanamo Bay to Snowden while growing up) aren't interested in doing cybersecurity for the US government or bureaucratic defence contractors, that's a totally different thing to "not being interested in cybersecurity at all".
This is the most important point. As a soon-to-graduate computer science and math major for whom cybersecurity is a possible career option, this is my biggest concern as far as working in cybersecurity goes. It's also a problem more generally. I want as little to do with the military-industrial complex as possible. Here in Tucson, Raytheon is one of the more popular targets for student internships in CS and engineering, but I'm not interested. I don't think I could work for a weapons company, or any the imperialist public structures that support them, in good conscience.
But if I continue to study mathematics and computer science after I finish my undergraduate degrees, I would be very happy to work on projects like Tor and Freenet, or crypto-currencies. There are alsocommercial security technologies I'd be happy to work on (like privacy-enhancing desktop & smartphone apps, a là TextSecure).