Never mind the specifics of the selection process, Silicon Valley's risk-adverse approach to hiring is baffling. Instead of making candidates go through an overly rigorous process, why not embrace California's at-will status and hire and fire often? Employers and employees already view each other with suspicion in terms of loyalty, the former willing to downsize capriciously at any moment, and the latter willing to jump ship every year or two. So accept the mobility and instability of startups. Instead of spending immense resources on the interview process to find the perfect, you focus on getting the good and terminate swiftly if they turn out to be bad.
Not to mention, even when you have these types of interviews it still doesn't seem to filter out toxic people, such as the harassers of Susan Fowler at Uber.
Of course, it would be easier for workers to be okay with this arrangement if basic needs such as health insurance were decoupled from one's employer. That's another argument for single-payer in CA.