I find it mildly insane that your only measure of productivity appears to be working on some sort of project.
If you're really not trying to do that, maybe restructure this sort of assessment to just be a computation of hours you will be awake. That would at least leave it much more open what a productive hour actually means.
I measure productivity by measuring the effective amount of time spent on things I truly care about. I should probably clarify, but "project" isn't always a coding project. For example I also want to study General Relativity and that's a project for me too.
But I would say that most of the human interactions (small talk with strangers, with colleagues, etc.) doesn't bring meaning to my life, although I'm married and has a kid.
If you're really not trying to do that, maybe restructure this sort of assessment to just be a computation of hours you will be awake. That would at least leave it much more open what a productive hour actually means.