Is this an argument made in good faith? The commentator said reduce meat consumption and that most people ate too much. They didn't say "ban it for everyone, let the autoimmune suffer"
If you reduce meat production, you'll hike up prices, likely pricing out those with autoimmune diseases that barely survive already. So technically you are true like in "you can still eat meat in theory", but in practice those folks won't be able. Now where is the good faith in that argument?
You're saying a lot of stuff and I'm going to need more evidence to be convinced as to your position. For what reason would meat prices increase if people ate less meat?