Lad, I'm just sharing information with you.They do in their bollix! For example, most people seriously underestimate the distance it would take to come to a stop in an emergency. We're not talking a foot or two here; we're talking 20 or 30 yards.
More than that, drivers often dont know what hazards lie ahead. There are far more dangers on the road than simply the car ahead.
Go do some reading on Road Safety Engineering and learn something before shooting your mouth off.