Organisations love hot-desking. It's what cool and virtual and edgey organisations do. 'People should be out selling' snaps the sales director. 'Avoid stress and work from home' adds the nice lady in HR. These are good points. But ask anyone who has hot-desked and is hot-desking what it has done to their stress levels and to their ability to sell effectively.
In the end, get data not hearsay.