And we’re talking National Guard here. The doctors and nurses in the National Guard already work full time somewhere in their regular jobs, so they would likely be pulling them away from where they usually work. Which means that they would be pulled away from other patients who need them.
There is a lot of new ground being covered here, the obvious one being whether an "emergency" resulting in the activation of the Guard can be something arbitrarily created by a governor or if it is limited to civil unrest, natural disasters, and declarations of war.