And think about it logically even if you are fiddling with the radio your attention has strayed away from looking out the window.
look at it without the car, you have to sit in your bedroom looking out at the main road, now your task is to count every red car that goes by in 3 hours. Now the first hour you are only looking out the window. Now someone gives you a phone and tells you to have a text conversation at the same time. I guarantee you will miss at least one car when you are looking away, that car could be a child who ran out to get their ball
look at it without the car, you have to sit in your bedroom looking out at the main road, now your task is to count every red car that goes by in 3 hours. Now the first hour you are only looking out the window. Now someone gives you a phone and tells you to have a text conversation at the same time. I guarantee you will miss at least one car when you are looking away, that car could be a child who ran out to get their ball