Sorry guy, but you're wrong. Most is stunt drivers on closed courses in the countries the story is about, or a similar looking country.
I've read much about the stunts in that franchise. Although Bullit originally set the standard, F&F has taken it to a level that the Bullit director couldn't imagine or afford. Yes, some is CGI. I'm somewhat of a film critic (concept, story, plot, acting, direction, cinematography, action sequences) so I can tell the difference between live action and CGI. Maybe not always, but the F&F franchise actually has real car sequences.
Any CGI disqualifies it from being pure car chase. If above-average Joe cannot do it in his car then I do not find it exciting.