You are completely missing the point. Meat is already expensive, indicating people would eat more of it if they could afford it. If conscientious people reduce

You are completely missing the point. Meat is already expensive, indicating people would eat more of it if they could afford it. If conscientious people reduce meat consumption, that supply will mostly just be consumed (at a lower price) by people that don't care. The goal here should be to make things like meat, car fuel, etc. more expensive (via taxes, or otherwise properly pricing in the costs). It might very well be the case that some people that can afford these increased prices continue to consume exactly as much meat and fuel as they do now. So fucking what? The overall consumption will go down, which is what we need. Overall consumption will not go down significantly if you just convince some fraction of people to voluntarily reduce their consumption.