Plants release pheromones when being collected, cut etc...[1] which some people argue is a way to express suffering and has lead some people to "eat only fallen fruit" [2]. The whole debate of vegetarianism vs vegan, is exploiting animal for food (milk, eggs) ethical? Some people argue that a pure vegetarian lifestyle is unhealthy...

This is why I am saying that one needs to draw a line, and that it isn't necessarily easy. It sounds like you made your choice and that it was easy for you, but that isn't the case for everybody.

[1]: https://www.wired.com/2013/12/secret-language-of-plants/

[2]: https://en.wikipedia.org/wiki/Fruitarianism

I fail to see how the possibility of further debate in the finer details makes the answer to your original question, what animals are moral to consume, less obvious.

Would you accept a plantation owner claiming slavery's immorality was not obvious because there were arguments to be had about the ethics of "wage slavery" etc?

>but that isn't the case for everybody.

This is a moral failing.

Where does the implication that other animals are moral come from? Is a wolf that eats pigs moral? If so, then why is a human eating pigs immoral or even 'disgusting' as you put it?

By moral being I do not mean they act morally but that they deserve moral consideration.

If this were not true why are we repulsed by the beating of an animal? Why do we invent such paradoxical concepts as the "humane" slaughterhouse?

Our moral intuition leads us to the answer but cultural norms and casuistry let us avoid it.