The article isn't entirely focused on scientists either. Many writers and other creative professionals are discussed. I think with Jobs et al, for however long

The article isn't entirely focused on scientists either. Many writers and other creative professionals are discussed. I think with Jobs et al, for however long they work, it's likely they still only do a limited amount of focused creative work in that time. The rest is spent doing the every-day politicking, intuitive decision-making, and administrative stuff that goes along with being a CEO.