Think back on how many times you've started a lane change and aborted because there was a car there, how many times you've looked down to navigate and hit the rumble strip, how many times you've had to rely on ABS to avoid hitting the car you didn't notice stopping in front of you, etc.
I don't want to criticize your driving but these are not common occurences for me (ie. the answer to most is 'never'), and I would be quite concerned if they were. Most are solved by maintaining awareness around you (including checking blind spots) and follow distance ahead of you.