Look, we know that animals experience pain, we understand the mechanics, we know the behavioral signs etc. These are clear facts.
We also know that plants lack these same mechanics, lack these behavioral signs etc. These are also clear facts.
Now we can hijack, or expand on, the meaning of the term pain. But as it stands now plants can't possibly experience pain as we know it.
We can argue that plants experience something that is akin to pain, but there is not a single shred of evidence to base these assertions on.
It's one thing to be open-minded, but it's another thing completely to entertain things that have no single indication of being true, we tend to classify that as wishful or even delusional thinking.
So on one hand we have animals that eat plants, and these animals clearly experience pain and are capable of suffering. Then on the other hand we have plants that according to scientific understanding do not experience pain and are incapable of suffering.
If one wants to reduce the amount of suffering caused by their diet (and lifestyle), then it's very clear that they should prevent the killing and suffering of animals.
If one wishes to believe that plants in some miraculous way are still possible to experience something similar to pain, then it still follows one should not eat animals, because you waste many pounds of plant protein in order to get a single pound of animal protein. (Eating plants would cause far less plant deaths than eating plants and animals, or animals alone,)
Basically it seems to me you are arguing for
fruitarianism, because fruit is actually '
intended' to be eaten by the plant. If you are not arguing for fruitarianism, then what is your point?