This seems feasible. Or maybe it's not happiness itself but just having other things you value highly enough that you make it a priority to give them uninterrup

This seems feasible. Or maybe it's not happiness itself but just having other things you value highly enough that you make it a priority to give them uninterrupted time: family, friendships, hobbies, etc. Perhaps it's a space-filling thing, where if you don't have those things for whose sake you need to set boundaries, including a hard unplug, work creeps into the available space? Or maybe it's a combo of competency and healthy work environment. You feel comfortable that you can get things done during business hours, and that your employer does not expect anything more, and so you feel good about setting boundaries, and that confidence is correlated with happiness?