No. Some people survive and doctors have a moral and ethical obligation to not throw their hands up in the air. Furthermore, without informed consent or advance directives, it's unfair and unethical to play god.

The circumstances of this situation is that ventilated COVID patients often drown in their own plasma, get bacterial pneumonia or their lungs are irreparably destroyed. Like ECMO, this sort of ventilation is a hail mary procedure to try to salvage patients.

Even COVID survivors with mild symptoms, they may have reduced lung capacity due to lung damage.. and that may well be permanent. I suspect lung transplant lists will be backlogged the world over due to this pandemic.