"Can't" is different than "don't want to." Is reading on your phone on the train fundamentally different than reading a book? Is chatting with your friends whi

"Can't" is different than "don't want to." Is reading on your phone on the train fundamentally different than reading a book? Is chatting with your friends while in line at the grocery store bad? Your point about the stop-light is true, though, because it's unsafe.