1) Guarantee of payment by card
2) Guarantee of receipt
3) Guarantee of going to the right destination
The week before I landed at Dulles and got an Uber. The queue for the taxis was very long, but the wait for Uber was hardly quick either. Last time I took a taxi in DC they refused to take card. That was pre-covid, but why would I take the chance again.
Taxi companies did it to themselves.