I am long on Uber: taxis are dead, it will not go anywhere. The only problem is that the board made a strategic mistake that felt good short term. They tried to retain users by pushing the founder out, and hiring a diversity CEO. This failed long term as any populist board move does. But they still have a chance to have their NeXT moment and bring Travis back.
Yes, let's totally bring back the frat bros, that will solve most any business model problem.
However, people can mistake a frat bro culture with actually high productivity (leaving aside questions of whether employees are harmed by the culture). Zenefits pre-Parkers-leave might be an example. Employees can't be getting drunk and having sex in stairwells during office hours and retain a high level of productivity.