I agree with no wasting your time. However, I don't agree with hustling all the time because the only thing that will wait for you in the future is a major burnout syndrome, depression or similar.
Hustle, but be aware of your mental health and also don't forget to relax. Your mind can't go non-stop. Professional runners also need a break after they do marathon or even an ultra-long run. Even Usain Bolt used to rela for at least a few weeks after winning his gold medals.