See, at the end of the day you're just drawing a line in the sand on what you think is acceptable. That is inherently subjective, and will be different from person to person. You might think one type of animal captivity is fine, while others might think that all animals should be completely free and left to wander off where they please - for better or worse with respect to what happens to them when they run away from home.

Ultimately, you telling people that they shouldn't breed animals to eat is the same as someone saying domesticated animals shouldn't be kept in households and should be allowed to wander free. The specific circumstances are different, but you're still telling people that what they think is right is wrong. That's just, like, your opinion, man.

Now, there's certainly something to be said for the farming industry in general causing problems for the environment and people in it (this is true for both meat and veg). However the core principle of saying eating meat is wrong simply because you're killing animals is a moral decision that you have made. Your morals should not be forced upon others, any more than theirs should be forced upon you.