Pattern-chaser wrote: ↑April 5th, 2021, 6:54 amAnd that is what this topic is seeking, a get-out-of-Hell-free card. It's seeking an argument with a convincing conclusion, and that conclusion must be that we cannot be blamed for anything. Thus, like those early Christians, we become pure, innocent and blameless by the use of this magical remedy.I think it's a question worth asking. I say "no" because, unlike a 1980s school, not everyone gets a prize. Not all are equal - not in abilities and not in depth of sentience either.
I do not think such an argument exists. We can take a pragmatic and open-eyed view of the world, wherein creatures kill and eat other creatures, and we can look at how we behave in that context/environment. And we can look within ourselves, and inspect our own feelings and beliefs regarding such things. And from this information, we can speculate, and we can construct a moral code that we find acceptable for use. There are no concrete conclusions to be reached, I don't think. But that doesn't mean we can't consider these things, and come to conclusions that are honest enough that we can live with them. Is that enough? Does it tell us what moral status plants should be given, and thereby satisfy the OP?
In the end, as you say, no matter what we do, most life must kill to live. Still, life is not easy so there's no sense making it unnecessarily hard for other creatures IMO.