We can make the penalties for any real problems that arise as strong as needed... when they arise. Expulsion from Uber/etc might be enough. If it isn't, it doesn't require traditional licensing/regulation to increase the penalties for specific actions.
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You missed his point. By regulating cabs, we can easily make the penalties for breaking the cab rules strong enough to deter bad actors. Uber can't.
We can make the penalties for any real problems that arise as strong as needed... when they arise. Expulsion from Uber/etc might be enough. If it isn't, it doesn't require traditional licensing/regulation to increase the penalties for specific actions.