If you have goals that justify working hard, like the satisfaction of a job well done; or hopes for a professor position; then do that.
If your goals justify not working hard, like enjoying your doctoral stipend while gliding through and then moving to some other profession, then do that.
If you have goals that justify working hard, like the satisfaction of a job well done; or hopes for a professor position; then do that.
If your goals justify not working hard, like enjoying your doctoral stipend while gliding through and then moving to some other profession, then do that.