Flight attendants get paid $2.13 per hour while at the airport, until boarding is done.
They do get paid more to fly, but it is of course a more skilled job than an Uber driver, and requires special training and testing that not everyone passes. And they cannot just work when they want to. They get assigned schedules by the airline.
There might be some ability to swap a flight with other flight attendants, and there might be some sort of bidding process of varying effectiveness depending on the airline, but at the end of the day it is not a flexible role like Uber.
They do get paid more to fly, but it is of course a more skilled job than an Uber driver, and requires special training and testing that not everyone passes. And they cannot just work when they want to. They get assigned schedules by the airline.
There might be some ability to swap a flight with other flight attendants, and there might be some sort of bidding process of varying effectiveness depending on the airline, but at the end of the day it is not a flexible role like Uber.