Aren't taxis inherently an on-demand business model? Uber/Lyft just made the whole model online. Wouldn't it have been sensible to enforce and regulate minimum

Aren't taxis inherently an on-demand business model? Uber/Lyft just made the whole model online. Wouldn't it have been sensible to enforce and regulate minimum fare thresholds based on ride and distance which can be even applied on taxis?