I mostly agree with you, and I would have wholeheartedly agreed with you 2 weeks ago, but I just read a book ("Listen, Liberal" by Thomas Frank) that makes some interesting points about how liberals have shifted from representing working people to representing professionals, and to worshiping innovation. While free trade and disruptive technology is good for the professional class, it inherently increases inequality.
Frank argues that after the liberal shift, "everyone" now agrees to these pro-business, pro-Wall Street policies, but we don't have to allow rapid disruption freely. We could do what Massachusetts is doing. We could have tariffs and bring manufacturing back. Policy can prevent the inevitable.
I learned about the book while vigorously researching Trump's rise to popularity during the primaries. I personally can't wait for self-driving cars, etc., but I think someone needs to be thinking of the swaths of working people who are afraid of losing their jobs.
I know lots of working people. Many of them don't want to go back to school or get technical training. Many of them don't want to start the next big company. They just want to work their job and go hang out with their family. What do we tell the taxi and truck drivers when Uber shows up with self-drivers, etc.?
I'm new to this line of thinking myself and I know there are lots of counterarguments. I just find it worth a ponder.