Yeah but what about YOU? Are YOU going to choose to not eat meat? Or are YOU going to wait to see what everyone ELSE does first? Its a game theory problem.
It is indeed the tragedy of the comments. That's why we need regulations, sanctions etc. This needs to be the number one issue for all international negotiations.
I say that as someone who cut down on 95-99% of meat consumption to reduce my carbon footprint and because I feel terrible for the animals