Regarding your first paragraph: I was operating based on a very loose hypothetical question that you posed. So, I think you’re unintentionally strawmanning me here a little bit…
As far as the second paragraph is concerned I see your point. However, I specifically said life had to consume other organic material to survive, but not necessarily kill in the process. At some level of the food chain it does ultimately become a necessity though, and I do not see that as an ethical dilemma per se.
Again, it was an extreme hypothetical. There were multiple people in this thread who outright suggested that as an option, which is why I asked the question.