For the first para, I was responding to this

If it was a matter of survival, we would become an input.

I was responding to this for the second para

As far as we know the propagation of life requires the consumption of other life as inputs

The point being there are many ways to survive without consuming life. Fruits and seeds are not living things. Anyway, I think the main point I’d like to highlight is that there’s no need to think we’re constrained to a singular way of being for anything we do