Every living thing must consume other living things. Some people don’t like this, and they feel bad about it, so they consume plants and think to themselves “At least plants don’t feel.”. But then how does a flower know to turn to the sun? How does a vine sense to wrap around a nail?
“Life feeds on life, feeds on life, feeds on life.”
– Maynard James Keenan
And it’s true. So far as we know, there is no method to live and not be vampiric.