Agreed. I do work that kind of schedule, have never slept much and nowadays sleep even less with the chronic intractable pain thing. But I am unusually fit for an old person, and my work varies from the entirely physical to housework to pure paperwork and nursing my disabled husband when he is not in hospital, interspersed with speaking and occasional forest classes, so my work has variety and change and different mental and physical stresses. I could never do the all-one-type-of-work 60hour weeks that Minna does. I’ve watched my youngest son, who is an artist/musician/farmer, work way too hard for most of his life, and have seen how hard it is on him. I couldn’t do what Minna does. And yeah, exhaustion can make you vulnerable, no matter how passionately you care about what you do.