Our society does not give husbands the right to kill their wives. The husband CANNOT decide that it is OK to starve her to death according to our values and laws. We do not accord one individual the right to kill another person.
Yes, that is true, but our society does give husbands the right to decide when to withdraw continuing medical care when their wives cannot decide (and vice-versa). That is what is happening here. The problem is that Terry can't eat by herself.
BTW, I have long had a durable power of attorney demanding precisely this outcome were I ever to be left in Terry's pitiable state.