The taxi industry has existed for a long time with a lot of the regulations that people are trying to force onto Uber. But drivers flocked from taxis to Ubers as soon as that option became available. That suggests that at least for those who've opted into Uber, Uber is preferable. Reducing the availability of that option (which is what these rules will cause) is going to hurt them, because the fact that they're doing Uber means that it was their best available choice.