The courts will laugh it out, of course. This is capitalism championing the 'fascism', and the god-emperor Profit that must not be jeopardized, global pandemic be damned. If the Fed cared, they'd mobilize emergency programs to train new staff or offer them some kind of boons or protections, and even that's too much work when that funding could go instead to building another nuclear submarine- it's not at all likely that this injunction gains any traction.
This is just the exceptionally shitty outcome for whomever continues to hope that corporations will do the right thing/protect their workers/accommodate the pandemic, or that they'll create the change we need to overcome the pandemic without federal action. Not that I'm asking for authoritarian government control in stating this, but worker rights and protections would go a long way in, I dunno, not killing people, or filling in the boogeyman of 'the worker shortage.'
If the Fed cared about the status of healthcare, they would:
1) Partially socialize healthcare, (enough that they become a major force in dictating market pricing for services and products, to end the inflated price bullshit they do with insurance companies to make insurance reps look good. (No, really, that is the real reason the prices are inflated--- so that then the hospital can "Discount" the inflated price, and make the reps look like they saved the insurance company money. For real.)
2) Pass strong legislation to prevent insurance companies from attempting to demand discounts below cost from hospitals in the name of Mammon, and require sane minimum pricing.
3) FUCKING NUKE THE AMA FROM ORBIT, AND OPEN UP RESIDENCY PROGRAMS. (this will drive down inflated physician wages through increasing supply, reduce physician error rates due to being overworked/overstressed, due to insufficient numbers of physicians, and thus reduce the costs of physician malpractice insurance, all in one fell swoop.)
4) Enact strong legislation about healthcare wages and healthcare services for healthcare workers. (Seriously, the people that provide healthcare, often have the worst healthcare experiences, because OVERWORKED, UNDERPAID, and expectations to work when fucked up, broken, sick, or when family are dying, sick, or wounded. Because you know, "Mandate to provide care." (like Wisconsin is pulling.)
BUUUUUUUUTT
The Fed is not at all interested in actually fixing healthcare. Some of their friends are members of the AMA lobby, and physicians making bank, but being overworked and not allowed to sleep because always on call, because systemic shortages of doctors-- IS MARKET EFFICIENCY!