For the same reason people care what Jay-Z thinks about laptops or whatever. Because he is a celebrity.

Hell, I remember some unremarkable actor (Kutcher, I guess?) being hired at Intel for some quazi-technical job a couple of years ago. Because marketing.

And you are wondering why Snowden (some hackerish dude that worked at some super-secret government agency and revealed how USA spies on everyone — or something like that) has something to say about everything privacy/security-related.