It's so far the only legal way the death-culters have to kill people who are not otherwise dying. The euthanists and lawyers and politicians agreed to define a feeding tube as "medical care" under the law -- for the sole purpose of TAKING IT AWAY. And so the law was amended, not only in Florida but all over the country. To kill "useless eaters."
Why use gas chambers? Starvation was more cost effective for the nazis. The disabled went first. Hitler's cousin or sister was developmentally disabled. She didn't last very long once the murders started.