But you have to have some public consensus or the government will never implement such changes due to their unpopularity. This is why I think promoting some reduction in individual meat consumption is still valuable - it is good for average people to reflect on their consumption or they will vote out anyone who attempts to change it.
I don't think that the focus should be on individual blame (even just for the reason that this is politically nonviable). But you at least need to amass some collective awareness.