I think reading the Reuters article I'm citing in full is the best way to understand what's going on. I've also tried to summarise it here:
https://news.ycombinator.com/item?id=22607485
The confusion probably comes from the definition of treatment. It's possible for simultaneously nobody to be turned away due to lack of a bed, whilst terminal cases they know they can't save are now being turned off quicker i.e. less aggressive intervention than before. That's what Grasselli is saying:
Lombardy intensive care coordinator Grasselli said he believed that, so far, all patients with a reasonable chance of recovering and living an acceptable quality of life had been treated. But he added that this approach is under strain. “Previously, for some people we would have said, ‘let’s give them a chance for a few days.’ Now we have to be more stringent.”
The next part is "living an acceptable" quality of life. This probably means anyone not brain damaged and anyone they think won't require oxygen later. Might mean people not currently on oxygen when they get covid-19.
And despite all of that he says that this system is under strain.
Read between the lines.
> all patients with a reasonable chance of recovering and living an acceptable quality of life had been treated.
These two quotes from you are mutually contradictory.