As Punter alludes to, if you're driving a car it's not really possible to devote sufficient attention to a job offer to decide whether it's a job that's worth paying for or not. I used to just accept them all (if driving) without looking and then cancel the one's that don't suit me for whatever reason when I have a chance to read them safely. These days, of course, you get penalised for cancelling jobs. With Free Now you lose some of your priority points (I finally learnt how that works so found out why my score goes up and down like a Corkman on a Ukrainian prostitute) and with Uber you lose your Blue Flag / Gold Star or whatever.
The fact is, these apps are designed to cause car crashes. All of the firms who operate these apps have some interest in promoting driverless cars and see themselves as predominately supplying driverless cars in the fullness of time hence it's in their interest to make human driven taxis as unsafe as they possibly can to improve the relative safety of the future driverless options.
As it stands, neither NTA nor RSA give a flying fuck about taxis meandering out of control with drivers fixated on their smart telephone screens. Probably the best argument in favour of a National Taxi App is that it could implement safety provisions that are of scant interest to the multinational ultra capitalist free marketeers.