Earlier quoted context omitted.
I don't think the point you make contradicts Steve Blank's at all; to me, Blank's thesis is that startups in the Valley no longer choose to pursue truly disruptive technological innovation because our ecosystem now almost exclusively rewards areas such as social media, where you have to run as fast as you can just to stay where you are, to the detriment of "hard tech" such as biotech, robotics, and the semiconductors…
Elon Musk made his fortune with Paypal, an internet company. Google made its fortune on the internet. There is nothing that prevents people from making the easier dollars first in something like Zynga and then going and putting their personal $10M to work on something of substance.
To me, Google falls squarely in the disruptive and hard category. I mean no disrespect to Zuckerburg, but there's a reason Google was founded by two Stanford PhD students and not a bunch of bored undergrads.