This is generally why I think it's a good idea for undergraduates to get a couple of years of work experience in before returning for their PhDs: the experience

This is generally why I think it's a good idea for undergraduates to get a couple of years of work experience in before returning for their PhDs: the experience of grinding out work that you really don't want to be doing is salutary and acts as motivation to get on with things once in the program.