The Catholic Church has never demanded that the terminally ill be kept alive by artificial means. I believe that the position of the church is that people be made as comfortable as possible,( which includes hydration and nutrition, by the way)
Why are you using this strawman argument?
Freezing an embryo is imprisoning a human who is innocent of any crime. Keeping them perpetually frozen is denying them their God given right to liberty and the pursuit of happiness.
Exactly the same with the terminally ill who have deteriorated to a vegetative state.
To avoid the bankruptcy of his position.