But the cars would be carrying speed from the main straight, through the Schumacher-S, down the next straight and into the Ascari (which, while not being a high-speed corner, is not taken at very low speeds), and two hundred metres is plenty of space to accelerate; cars from the fifth row of the grid often top one hundred kilometres an hour as they cross the line at the start of the race.
Besides, you can’t have every corner as a fast corner. Even Monza has braking zones.