It's not that people are saying "this man needs a bed stat" and then rejecting them; it's that the standard used for admittance tightens up during triage conditions and that means the edge cases are getting denied a bed much more often. Some of them then die. I mean, there has been a decent amount of reporting on this recently. For example, today's NYT:
New York Put Recovering Virus Patients in Hotels. Soon, 4 Were Dead.
Also recently:
He Went to 3 Hospitals. When He Finally Got a Bed, It Was Too Late.
For starters both stories are tragic.
The first involved a common practice to isolate but the follow up was the issue and not purposefully restricting admission because of overbearing demand. At least that's my assessment.
The second article the family left the second hospital when he may have been helped. That's indicative of an overused system I agree but he wasnt rejected because of any policy.