So my view would be: we should avoid unnecessary harm wherever it occurs, but we must prioritize preventing the most intense and obvious suffering. And right now, that means reducing and eliminating the killing of sentient organisms when we can live well on plant-based foods.
— Truth Seeker
It sounds like you are projecting your own personal value or psychological state onto the nature and the eco system unduly and with some emotional twist. The nature works as it has done for billions of years. It operates under the system called "survival for fittest". Lions always used to go and hunt for deers, striped horses and wild boars. If you say, hey Lion why are you eating the innocent animals killing them causing them pain? And if you say to them, hey you are cruel, bad and morally evil to do that. Why not go and eat some vegetables? Then it would be your emotional twist and personal moral value projected to the nature for your own personal feel good points.
Lions must eat what they are designed to eat by nature. No one can dictate what they should eat.
Same goes for human. Human race is not designed to eat rocks and soils, just because someone tells them it is morally wrong to eat meat, fruits or vegetables because they may suffer pain, and they might have minds and consciousness.
The bottom line is that it is not matter of morality - right and wrong. It is more matter of the system works, and what is best and ideal for the nature. If it is healthy - keep them fit and keep them survive for best longevity, and tasty for the folks, then that is what they will eat. — Corvus
I think it’s important to distinguish between what happens in nature and what humans choose to do. Lions must eat other animals because they have no alternative. Humans, by contrast, have alternatives. We can thrive on plant-based diets, which are now supported by mainstream nutrition science, and in doing so, we can drastically reduce the suffering and death we cause.
Appealing to “nature” as a moral guide is tricky. Nature also contains parasites that eat their hosts alive, viruses that wipe out populations, and countless brutal struggles. If “survival of the fittest” were our moral compass, then any act of domination or exploitation (e.g. murder, torture, rape, robbery, slavery, colonization, child abuse, assault, theft, etc.) could be excused as “just natural.” But human ethics has always involved questioning our impulses and asking whether we can do better than nature’s cruelties. You used the word 'designed' for humans and lions. Humans and lions are not designed. They evolved. Evolution is a blind process, it has no foresight, plan or conscience.
So I’d say the real issue isn’t whether killing happens in the wild - it obviously does - but whether we, with our capacity for reflection and choice, should perpetuate unnecessary killing when alternatives exist. Lions can’t choose beans over gazelles. We can. That’s where morality comes in. Lions murder other lions, and they have no police or legal system to punish the murderers, but we do. Humans are not lions, and lions are not humans. We have the capacity for moral reasoning - lions don't.
Veganism is far more than a diet. It's an ethical stance that avoids preventable harm to sentient organisms. Fruits and vegetables don't suffer pain because they are not sentient. Humans, lions, zebras, deer, chickens, cows, lambs, goats, pigs, octopuses, squids, dogs, cats, rabbits, ducks, lobsters, crabs, fish, etc., suffer because they are sentient. Please see:
https://www.carnismdebunked.com
https://www.vegansociety.com/go-vegan/why-go-vegan
https://veganuary.com
