You don't have a problem with an increased level of emissions relative to other possible scenarios of our food system? Imagine if 50% of meat eaters ate 50% less meat, particularly beef. That'd lead to ~25% less meat emissions, aka ~15% less food-based emissions. It's a substantial step towards neutrality without anyone giving up a food permanently.

Long term, we're going to need lab or plant-based meats, since I doubt we'll ever convince people to give up their cherished food items unless economics makes it incredibly expensive.