When you eat that organism, its cells that feed you were produced because it ate flies, those cells are not products of the flies death?
Isn’t the logical extension of this that nothing is vegan? Think about it: animals in nature get preyed upon constantly. A wolf kills an elk, eats part of it, and then its corpse decomposes. The carbon from the decomposing body is then used by plants in the biosphere to build new cells. These plants are now the products of dead animals. Are these unethical to eat because they had their cells built from recycled carbon that once belonged to an animal? Probably not. And this is true of all plants everywhere. And if you were to say “yes, but those plants didn’t kill any animals themselves,” then that argument would also have to apply for humans eating venus flytraps: humans didn’t kill any animals themselves; they’re just consuming something that did.
Isn’t the logical extension of this that nothing is vegan? Think about it: animals in nature get preyed upon constantly. A wolf kills an elk, eats part of it, and then its corpse decomposes. The carbon from the decomposing body is then used by plants in the biosphere to build new cells. These plants are now the products of dead animals. Are these unethical to eat because they had their cells built from recycled carbon that once belonged to an animal? Probably not. And this is true of all plants everywhere. And if you were to say “yes, but those plants didn’t kill any animals themselves,” then that argument would also have to apply for humans eating venus flytraps: humans didn’t kill any animals themselves; they’re just consuming something that did.