Thinking they are only looking down for a few seconds at a time, they do not realize just how much can happen in a few seconds. It is said that looking at a basic text for a few seconds while going at an average speed is equivalent to driving the length of a football field. That's a lot. You don't know what can happen in a few seconds, what other life will you impact other than yours.
This year an increase in texting and driving accidents have been seen. No Text is that important. If it is urgent, pull over to a safe area. By texting and driving, you are putting your life at risk including others.