It suggests that there is a problem in communication. Maybe our assignments were not clear. Maybe we are expecting that students have more time than they do in reality. Maybe we are expecting that the students share our motivation, when in fact we need to motivate them. If we consider cheating a call for help, we will be wrong some of the time.
Some people are lazy, some people are greedy.
But most of our students aren't. They want to learn. Sometimes they don't know how to get us to hear that they are confused without having us get mad at them. Cheating is one way of stating a validity claim. Not a very good way.