if you drive some of the rural roads in Britain you will know that there are, at times, a need to overtake slower moving vehicles.
lorries, caravans and people who just dont want to drive as fast as you do.
can you inagine sticking your foot down and not having the speed or power to pass ??? (within the limits of the law)
i know you mention 80mph and most rural roads are 60mph max speed.
im not a speed merchant and have no desire to travel above 80mph, but i do want the power there if i ever need it.
removing the power/speed would have to be done by limiting revs. this would limit every gear and make some driving conditions very dangerous.