At what point does a bump become a track feature like a turn that you have to slow down for or adjust your setup to deal with? The drivers would crash a lot less if we straightened out some of the turns, too.
Why?
It's part of the track that everybody has to deal with. If the car/driver is incapable of working around the real-world constraints of the track, they crash or need to drive slower: The track not being smooth as glass is part of driving the car.