To be fair, that is the investors' risk and part of their return. Uber very likely didn't lie about their risks in their investment prospects so everyone buying UBER should be aware of the inherent regulatory risk for the business.

I don't agree that investors should be protected from this (or from TSLA assertions), if you are investing you should be more sophisticated than buying stocks blindly, there is a risk to any investment and, obviously, that is why it can be so profitable.