Setting unrealistic goals has nothing to do with the goal itself. Instead, it has everything to do with how you prioritize your time.
A goal is about your future, a priority is about your present. If these two are not linked, then you’re setting unrealistic goals. Your daily priorities must include working on your goals.
A goal is not something you work on once a week, or once a month, or whenever you feel like it. A realistic goal is something you make time for every single day.