Edit: thank you for all the thoughtful replies from the people who downvoted but left an explanation!

The more I think about this question, the more complexities it creates. I am not a vegan, so I can only guess what the average vegan would think...

• If you eat a plant that causes harm to a living being like an insect, are you doing a moral good from a vegan perspective because you are reducing harm?
• Would it be morally good for a vegan to use vegan means to prevent more harm to animals?
• Would it be the ultimate moral good for vegans to hunt down every wild Venus flytrap and consume them?
• What if the Venus flytrap only ate insects that significantly harmed animal or human populations by spreading diseases?
• If vegans could alter the environment using non-vegan means, in such a way that bats stopped eating mosquitoes without upsetting the overall ecosystem, but these mosquitoes started spreading a terrible but non-deadly disease in humans, would it be moral for them to do so, or would it be immoral for them to avoid it?

Unfortunately, I don't know the calculus a vegan uses when placing value on the life of a human versus an animal, so the bat mosquito thing is entirely up in the air for me up in the air for me