You're not a marriage counselor to work from home. You work at a company that builds products, some are life-changing products, products that require maximum focus, productivity, discipline, quality check, again and again. At-home productivity will never equal at-work productivity. At-home discipline will never equal at-school discipline.
Just like you'd never be comfortable with a home-schooled heart surgeon; or get on a rocket built by engineers who worked from home.
Anyway, that said, good riddance to him. There are no irreplaceable people.