I've been on many family farms that are free range and ethical producers. I can say first hand the animals generally live an idyllic life up until they are killed for food. Far better and less stress than other animals in the wild live up until they are killed for food by predators as most prey animals live a life on the run and in a constant fear state.
It is just stupid to think that a deer raised on an ethical farm does not want and deserve its life simply because one day it will be killed by man for food and yet a deer in the wild, that will be hunted and killed by predators does want and deserve its life.
that is man layering something on to the animal the animal does not want or care about which is a belief that dying at man's hand is somehow wrong but dying at a wolf's jaws is ok and disregarding that the one that died at man's hand likely had a far better life up until that point.
The deer, if it had a voice would certainly tell the well meaning, but naive vegan to go fuck themselves and to let them have their lives on the ethical farm.