Can you really reliably do that in Poole & Bournemouth, at any time of day or night? Certainly can't in my home town. They rank in two places (town centre and railway station) during the day (and you won't find any at school contract time) - the rest of the time it is on 'phone/app demand, and they'll come when convenient for them, which may be convenient for me also. In practice there is no hailing on the street. Whereas my car is there for when I want it. I certainly wouldn't hire a taxi for a 40 mile trip, except in extreme circumstances, but my car will take me there in a fraction of the time taken by public transport.