My money would be on that being half right. They have no way to really measure productivity, but they were very afraid that productivity would drop to zero—and that is something they would be able to see.
Before COVID I don’t know how many times discussions around WFH basically stopped at “we can’t know that people aren’t just watching TV all day”. I think in a lot of places that was a genuine fear—nobody will be working.
So seeing productivity not go near enough to zero to be noticeable was… really good productivity compared to some people’s initial expectations.