If he is dying,nutrients won’t help,nor will they hurt.
And THAT is where you are wrong! And if you were a medical professional you would know that.
No.
If it is clear they are hurting, they are stopped. Then the question is answered.
No one can know when the time is until I happens and response is monitored.
I feel you have been obtuse and dogmatic.
It seems your a priori position is death is always inevitable, so just let it happen.
We are not talking heroic measures.