Does it really matter if animals are slaughtered for consumption?
The meaning of ‘matter’ when used as a verb means ‘to be of importance’ and importance or significance isn’t something that just exists objectively in empty space. There has to be a mind of some sort for the importance to ‘live in’.
So when we talk about whether or not something ‘matters’, we are really talking about whether it matters to me or whether it matters to you, unless we happen to agree that it is important to both of us.
If we are not in agreement about that we have to discuss what ‘should matter’ to a person, which gets into a discussion of morality. Morality is the same as importance, it doesn’t exist in the world independently of thought; there has to be a mind for judgements of right or wrong to exist in.
So I will rephrase your question like this: “should it be of significance to someone that animals are slaughtered for food when their slaughter is unnecessary for adequate human health”? My answer would be that it depends on the person.
If ‘Person A’ considers it wrong to kill a pig for the purpose of taking pleasure in watching it die, then that person should also consider it wrong to kill a pig for the purpose of taking pleasure in eating bacon, because why would one type of pleasure make it immoral and the other moral? That doesn’t make any sense, so in this case the answer to the question would be ‘yes’.
If ‘Person B’ considers pigs to be ‘things’ with no moral value, and would kill one for no other reason than to watch it die, then it should be of no significance that a pig is slaughtered for the sake of palate pleasure. It would be inconsistent if it did matter, to that individual. So the answer in this case would be ‘no’.
We want to say that it ‘should’ matter to both of them, but if you look at it logically, that is not the case. The bright side is that most people hold animals to be of at least some moral value and this entire segment of society can eventually be veganized. But the psychopathic element of society that would just as soon use animals as target practice cannot be.