To play devil's advocate, would you accept the same trade? We've provided you with medicine, police protection, and subsidized food and shelter. Does that give me the right to presume that I should be able to eat you?
That's before you get into the fact that we don't give animals a choice in the matter. They can't opt out of our protection and their eventual slaughter. We presume that it's acceptable to agree to that bargain on their behalf.
Like I said, it's a thought experiment, but it's one that leaves me uneasy with the consequences.
https://en.wikipedia.org/wiki/A_Modest_Proposal
Are you familiar with it? Obviously, it's not quite the same, but this was the first thing that came to mind from your comment.