There are many bad things about the work situation you describe. The worst thing about this (to my eyes) is that this describes the norm, not the exception. And the attritional effect of constantly having to scramble to meet the minimum needs of your patients, comply with regulatory demands and trying to keep your patients comfortable, cared for and treated well must eventually wear you down.
It raises a number of questions.
First, it's clearly not safe. Lack of of cover means you can't give patients the attention they may need. If a patient's condition deteriorates suddenly, nurses