Zero sum game that requires my own death to achieve - seems a reasonable request compared to a request to not participate in the forcible birthing of billions of animals into exploitative confinement until they are killed at our convenience for eternity, or the unecessary trawling of trillions of them.

Or we can seek to achieve what is possible, and work out what isn't over time. You describe a technical problem. That aside can you even empirically prove that more animals die in agricultural fields than in nature? I'm all in favor of reducing those deaths but is it actually any worse than if we let the existing fields reforest? I don't see your point as analogous to my own concerns.