If someone breaks regs, you want to be able to levy fines or jail. If they do it a lot, you want an inability to drive at all.
It's about regulating poor drivers. And yes, initially vetting a driver too.
I don't think it's about driving ability, besides the initial vetting.
Understand, I am not advocating this. I said I did not like it. Neirher of those statements have anything totk do with whether I think it will come to pass, or not.