Curiously?
The author of this piece needs a full brain flush if he thinks this is curious. I've never used Uber, but I'm pretty sure the app doesn't give users the option to call a male or a female driver. If ride generation is sex-neutral, it's hard to see how "discrimination" could enter the equation even on the absurd hypothesis that someone would want to do so.
I'm going to make a completely sexist, misogynistic and trans-phobic assumption based on the name Sissi that the author is a she.