Doing something while procrastinating may be enjoyable. But along with it often comes guilt - sooner or later. I had issues with procrastination and occasionally still do. Even though some outcomes of alternate activities may be good, projects should not have the purpose of procrastination.

Passing time is when you deliberately do not work on any project. I think projects can not have and should not have the sole purpose of passing time. If a project brings you joy, good, if not, the activity should not be called project.