Well, I'll quote Paul and then let this rest:
Let not him that eateth despise him that eateth not; and let not him which eateth not judge him that eateth: for God hath received him.
I'll promise not to despise your position as long as you don't judge mine. You can have your herbs if you want.
I think you are taking this out of context. In the letter of Romans, Paul is centrally concerned with
Jew-Gentile unity. In that context, there is the contentious matter of what meats are "clean" - the Jews will consider some meats to be unclean, while the Gentiles will not.
Paul believes that the Law of Moses is abolished, so all meats are equally clean. But he realizes some with struggle with this issue. So Paul tells the church to not get hung up on these matters - there may be some who will abstain from all meat because they are worried about eating unclean meats - they are "weak" in the sense that, unlike Paul, they are
still convinced that
some meats are unclean. And there will be those who share Paul's view - that the kosher food laws have passed away, signifying a new chapter in God's plan.
This is entirely a separate matter from what we are talking about. We already know that just because we are "allowed" to eat meat, this does not mean that eating meat is the "best" choice.
And I suspect that Paul would agree - to the extent that we can, we should model the coming to the world. This world is one in which death is defeated. Death is
anti-creational, something that God
hates, and sent His own Son to defeat. God loves animals too - its not "all about us". So I think the case is pretty strong -we send a powerful pro-gospel message to the world if we stop "doing business with death" - enjoying meat at the expense of the lives of animals.