They get paid for what they do, their "profession". Most of them are not particularly good ;)

Don't they also need special driver licences, which can have more stringent rules?

That may be true, but on average I would expect them to be better drivers than the pick-up-in-the-inner-city crowd, whose choices are already off to a poor start before they turn the ignition key, after all, they picked the wrong vehicle for the surroundings.