That's the thing: normal people don't. Violent criminals, people with active arrest warrants, and people carrying highly illegal/dangerous things in their vehicles are the types that run from traffic stops.
What about people who are convinced that police may kill them for mild violation as they saw that multiple times on the news and social media? The reaction to flee may be justified at the moment as it is life or death anyway, even if only in their heads.
There are a lot of "normal" people around who will act abnormally in a high stress situation.
People will confess to crimes they didn't commit if the police are persuasive enough, that's why such evidence is illegal.
Yes.
> People incapable of handling a traffic stop should not be licensed.
Also yes. But both of those points apply to the (US) cops and they frequently fail on both points (the first amply demonstrated by how many police chases end up in crashes and/or deaths; the second by any one of thousands of videos showing where the cops needlessly escalate traffic stops.)
I beg you to watch the John Oliver segment where he gives several counter-examples to this narrative.