There is a difference between popular management books and academic publications.

For example there is a long history of studies of the relationship between working hours and productivity which is one of the few things that challenges the idea that longer hours means more output.

Yes, but the books generally take their ideas from the academic publications. And the replication problems, and general incentives around academic publishing, show that all too often, the academic publications in the social sciences are unfortunately no more rigorous than the populist books.