Ask HN: Why does a busy man build a shed?

This is the time of year for pondering and learning. I am pondering why during 10 years of helping grow/maintain a busy Saas infrastructure I spent a great deal of my free time building two sheds in my garden. They have been a place to deal with stress, an office, and now a place to hangout. So why does someone create work for themself when they are already busy and is this wise?