There are also a lot of people who are genuinely enthused (obsessed) with computer science and who devote their lives to knowledge... Who learn how to implement JK flip flops on a breadboard, build languages entirely from lambda calculus, and study convex optimization in their free time. More importantly, they do so because they love hacking, not because they love being a hacker (though I admit hacker culture and community is something I value).
Somehow I don't think graduate students are in on this Valley subculture stuff.