1) Any citations to support your claims? I could not find any statistics about mortality of Formula 1 car drivers in street accidents, could possibly have to do with the fact that Formula 1 cars are not allowed on the streets at all and all the accidents happen on specially designed tracks with only other 600kg cars and tire walls to collide with. I somehow doubt that you had "very very very" good chances to survive after driving under a truck in a Formula 1 car, unless they invented some cure for decapitation recently.
2) Death rate per population would be meaningful if the number of vehicles per population and the driving habits had been the same. Death rate per vehicle*Km is much closer (5.7 and 8.5 according to Wiki) and could be explained by the fact that people drive more through urban areas at low speeds in UK.
What you are trying to prove here is that physics are wrong.