What it does is give a huge incentive to wait if it's possible to wait. On the busiest days of the year, Uber sends out a message to let people know when those busiest times will be, so people who care about the price can plan accordingly.

My post was mostly focussed on those who _have_ to go at certain times. E.g. to see a docter during an injury etc.

And is it fair that someone who has other means of transportation gets a cheap ride, while the elderly person who needs a cab urgently is forced to wait for his chance because there aren't enough cars on the street?

That would present you with a great business opportunity: transporting people at specific prescheduled times, since current options are failing. Hopefully you won't have regulations preventing you from doing so.

Have I stated anything in that regard of why do you ask?

You have to compare that to the non-availability of cabs. Is 5x more fair than a cab that you can’t get for any price?

An elderly, disabled, or injured person is poorly served by unavailable services.