I'm skeptical of the 19% who can't work from home. BLS says that food prep, transportation, production, healthcare practitioners are the 3rd, 4th, 5th, & 7th most common jobs. This totals 43 million, most of whom probably can't work from home. https://www.bls.gov/oes/current/oes_nat.htm

Edit: Another commenter claims the author sampled workers through Mechanical Turk. WTH.