I wont be able to say for sure till after the report but I took it to be low functioning individuals.

People who have a nominal quality of life and require full time care. Generally with such severe disability they cannot give informed concent.
In time of a pandemic where there was a concern that there wouldn't be enough ventilators going around its a hard choice to make. Every DNR you sign for them possobly saves a life a person who could go on to lead a happy well adjusted life given care. Which is the eithic choice? Sign the paper and hope for the best? If you don't there will be a story in the news about a single mother of two that died for want of a vent and you know your actions might have stoped it. Its a brutal game played with peoples lives but I don't think I can fault a doctor for any decision they make in those situations. No one should have to make that kinda call. Capitalism goes brrrr though. So someone has to.