Hospitals are built under vastly different codes than commercial real estate. How they withstand severe weather, width of doors/hallways, ceiling heights, air filtration, power grid considerations, storage of volatile chemicals/gasses, type of fire suppression, number of elevators/size, etc.

It’s often cheaper to demolish and build from scratch.

Now, for residential conversion from a former commercial office space — wayyyyy easier.

For what it’s worth, a lot of companies aren’t acquiescing to the work from home paradigm shift. They should, but they’re fighting it tooth and nail.