Actually this has been going on for decades. The difference now is your health and welfare is not important whatsoever. It's how much money will move into that hospital system.
A patient on life support takes up resources and the hospital only gets paid a certain amount of money for whatever it does to provide care. After a while they start to lose money if they can't boot your ass to a nursing home.
Get rid of you and get another patient in: churn and burn. You aint shit unless you are walking out or an organ donor. Hospitals make a shit ton on organ and tissue donors.
As far as 40%? I'll bet it's as high as 75%. Majority patients removed from life support are unable to participate- much less anticipate end of life scenarios. Docs talk and literally coerce families into removing life support "you know your dad wouldn't want to live like this".
Talk to your family and friends about this sort of thing. Talk about organ donation as well. Let them know whether you want that or not. Do not agree to donation after being removed from life support