Sure, I believe it was his intent to care for her. But after 8 years, all hope was gone (no one has recovered from PVS after 3 years).
WE have the benefit of hindsight. Michael didn't, and couldn't, have known at that time how things were going to transpire.
Then tell me why Michael testified he wanted to take care of Terri for the "rest of her life". Guess that was only for eight years, ummm?
My guess is that he thought she would get better. She didn't.