I think he can say that because there are many employee working in his company are asking to work from home, so he don't like it and say like this, to make his employee stay in his company. Work from home is obviously more productive, but a businessman will ask his employee to help other people jobs even though it's not their job desk, a businessman don't care, he will say it's a loyal act for the company.
I remember he mentioned he worked literally 24/7 so he made his factory as a home too so he is giving more time than 9 to 5 worker even now he is just living a small ready built house his factory.
But its really subjective according to what job we are considering but for the sake of company they can avoid lot of unnecessary expenses if they let the employees to work from their home but if I am not sure everyone will be well disciplined like working in an office with working from home like they can be lethargic and postpone their task and if this becomes a culture of upcoming generation then we may see slowness in the work that is probably he meant.