I don't have verification but a prior service attending told me they saw a DOD official on tv saying the guard would be trying to avoid pulling medical resources for that reason....but I can't imagine a governor can resist the look of "doing something" by calling up a bunch of people
The urge to "do something" is a powerful force for harm in medicine, and life in general.
The Navy is deploying its two hospital ships, the Comfort and Mercy. Comfort is going to New York, and Mercy is going to Los Angeles.
Now, of course to staff these ships, they need to pull physicians, nurses, techs, and other support staff from military hospitals. At this time, those hospitals are not taxed with COVID-19 patients the way NYC is. But I think we all understand that they will be. So we're taking personnel from their usual, more-or-less ideal practice environments, and putting them on platforms with inherent limitations and compromises.
The current plan as I understand it is that the two hospital ships will only take on non-COVID-19 patients in an effort to relieve some of the burden of overwhelmed hospitals. It strikes me as absolute fantasy to think you're going to pull uninfected persons from a hospital overwhelmed by a pandemic and not get any cases on the ships. And again ... these are ships. Ships where "social distancing" of crew members is physically impossible. Ships that routinely have outbreaks of viral URIs and diarrheal illness during ordinary humanitarian operations when there isn't a pandemic going on.
So. I can't say I'm bursting with confidence that this is a good idea. But we're "doing something" ... I guess we'll see how things go. There's certainly a benefit to surging medical capacity to the epicenter of an epidemic or other disaster. So we'll see.