Yes we lust for new things, which is why the author can afford a computer to write his article on; yes we lust for profit, that is why joining a start-up and taking up the huge risk is something one is willing to do; yes we make old businesses obsolete, but that just frees people to join other companies which are capable of creating stuff, not sucking up resources.
The only thing start-ups forces people to do is to think and adapt. And if they aren't willing to do so, they have nobody but them-self to complain about.
And no start-up can create a bubble, those bubbles come from the insane recklessness of the FEDs dollar printing and the resulting super low interest rates because there is too few productive places to invest ones money.
We need more start-ups, not fewer; We need more economic activity, not less and we need more people with ability, not clones who will never amount to anything.