You can reach 2 billion people for pennies. What's more, this stuff isn't hard. Children can learn HTML and CSS, modern web frameworks make it so that you can build great stuff on the back or frontend in a matter of days or weeks. Seriously, write a small Sinatra or Flask app. It's easy.
Why is that not good enough? We really so ungrateful to believe that reinventing everything is the right step now? Nothing is stopping anyone from taking existing tech and building great, usable, lightweight sites. Seems like focusing on that would be about a billion times more productive, yeah? You can't really expect to throw away 30 years of ongoing progress and build a better experience in months or even years without losing something.
Just seems like a bunch of fluff. He'll never build anything like it. This is like sitting there in 1600 and saying that the printing press sucks because it doesn't encrypt documents. You've got so much potential that remains unharnessed (low-hanging fruit even), and we'd rather build a new system.