I'd think in the great majority of cases it's to make people better drivers rather than get them off the road. In a society where driving yourself around is a basic requirement for participation, actually stopping people from driving is a last resort. That's why I favour giving the option of a speed awareness course instead of a fine or points for a minor offence.
If people treat a paltry fine and a few points that never quite add up to a suspension as an occasional inconvenience, then their driving, and driving culture generally, will not improve. Getting a group of people who all did basically the same thing to talk about why they shouldn't do it, seems like a better way to reach the majority.