I mean, Id argue that is exactly the way the system is designed, and it mostly does the job it is designed to do, not just a side effect.

Defining what makes a non-hostile workplace is hard, enforcing it on individuals is harder, so instead delegate that responsibility to each individual company and take action on the company if it does not do that.

In no way is it a perfect system (cue tons of excessively formalized training etc), but it is the best system I know of.

Allowing companies to remove the external force of "If you do not do this, you may face civil action" breaks the model though, so I completely understand why Googlers would like to remove forced arbitration. The risk of that is a contributing factor towards compliance.