As I said in a previous post,"it's your right to choose" If you want or need to use UBER ,I firmly believe that it should be your right to do so.
However,I prefer to pay cash as I usually make my taxi taking decisions from one minute to the next and they are short and repeated often.
UBER is not a favorite with taxi unions not only in BA but also in NYC and Bogota,Colombia.
In NYC union drivers in cabs I was in yelled unfriendly comments to 2 UBER drivers who asked for directions.
In Bogota it was worse than either place.An UBER driver's windsheild was smashd by a huge rock dropped on it from an overpass bridge and the driver had to abandon his car with blood streaming out of his nose.As horrible as that was,I believe it created more support for UBER than any other business campaign.