“Hannah ... says she “regrets nothing” about her decisions.”
Except that she did regret her decision to kill herself or else she would be dead.
I don’t quite think that was the issue. We assume that, but it seems really it was just “let it be”, not “kill me”.
If you read closely it seems like the she wasn’t asking to be allowed suicide, it was she wanted the power to decide to not get extraordinary treatment like a heart transplant. I am sure you would agree there is a tremendous moral difference between actively taking a life and letting nature take its course without taking extraordinary steps to save a life. As the Charlie Gard story illustrated, the British medical system seems to think that it has the right toke make all the decisions for a sick person.