As semi-autonomous and autonomous cars become the norm, I would adore to see obtaining a drivers license ratchet up in difficulty in order to remove dangerous human drivers from the road.
I think it would be far more effective to make it easier to lose your license than it would be to make getting the license more challenging.
The absolute most dangerous drivers I see on the road aren't bad drivers in the sense that they're unskilled at controlling their car. I can't weave between cars at 120 mph or cross three lanes of traffic to make an exit I didn't see until the last second without killing myself, but I routinely see people do that. Sure they don't care about driving safely and/or following the law, but they're probably sane enough to pull it together for a brief driving test.
The other big category of dangerous drivers is drunk/distracted (texting) drivers. Again, most of the people engaging in these behaviors are probably smart enough not to do them during a driving test.