The reason people use chatgpt like this is the same reason kids have stopped reading. Actually learning things clearly doesn't actually get you anything in our society. University degrees are just things you do to get a better paying job. School is just something you do because you have to do it. In a society that values profit over everything, why shouldn't you put in the least amount of effort possible? The idea that schools create responsible and active citizens or that universities create people whose knowledge can improve the world has always been a farce, people have just started realizing it.