The point is not to make people for eating meat, just like it's not to make people guilty for lighting and heating their homes with coal-powered electricity. It's just to live sustainably. Let's not deny the facts because we don't like to hear them.
Is eating less beef a decrease in life comfort? Yes, it certainly is. It's still much, much better than living in a +2°C hotter world, in which getting any food at all will become challenging.
The problem here is that would require an enormous international agreement. I do not see the political will for this in the largest polluters (US, China) and corruption would be a major problem in large parts of the world.
Doing this on anything less than a global scale would lead to unintended side effects where importing from country A get cheaper because A does not tax GHG emissions, just replacing the emissions.
You could theoretically fix this at the border with tarifs, but determining how much emissions a particular product caused becomes real hard real quick.
Kinda like FCC for radios.
> I do not see the political will for this in the largest polluters (US, China) and corruption would be a major problem in large parts of the world.
Doesn't mean we should skip engineering energy efficient devices. That is just an additional requirement.
Let's stop burning coal and worry about he rest later.
Note, I'm all for protecting forrests, reductionism etc, we should just stop making people guilty for eating food.