It doesn't matter if you live in Las Vegas or are visiting to have some fun, there's a good chance you'll regularly consider yourself a pedestrian. For example, many people spend a lot of time walking up and down the Strip, visiting one casino after the next.
As a passenger, it is easy enough to trust the driver you're with and fiddle around on your phone until you get to your destination. You don't think they'll make a mistake or put you in danger. You probably don't even spend all that much time watching the road or watching the driver.