Except that's not how public safety works. Part of why this regulation exists is because having unregulated taxi drivers (at least to the judgement of lawmakers) poses a danger to everyone else on roads etc.
It doesn't always work out this way, but I think in the case of companies like Uber, the interests of the company, the customer and society as a whole all align. To be able to make a profit, Uber needs to be perceived as safe. The most effective way to do that is to actually be safe.