While this is partially true, there's been a lot of study on what makes us feel like we have purpose, and how our sense of purpose drives our well-being. They’ve even done studies on the elderly and found that those who retire and just "relax" tend to die earlier than those who continue to "work" in some way (note that "work" is broad in this usage. Volunteering, or having a structure and activities where you feel like you're filling a need is included).

A carreer that you are able to partake in with severely reduced hours can easily be just that.