Much of the crowd here isn’t very smart.
They simply happened to be at the right place at the right time, ie a time where “software was eating the world” and also the iPhone/Android took over.
Finally, the success of the actual smart people in Tech (Google, Apple, Amazon, FB) who are largely pre-iPhone companies, meant that there was a lot of venture money flowing around, when the VCs discovered the Uber model. Spend a ton of money to establish monopolies (and break a bunch of laws along the way, which you could get away with because Tech still had a good reputation thanks again to the pre-iPhone pre Web 2.0 companies) and walk away with the money while exploiting customers, clients, governments and employees.