Of course we would exclude a product from one of the biggest industries at fault for literally every single common environmental issue we have. Animal AG is horrible for everyone involved and not involved.
Everyone hates lobbyists, and it is not just a waste product like they claim but on the other hand, the cows are not killed for just the leather. It is certainly an extra source of income and a reason for the farmer to have and eventually kill the cow.
But the main reason for slaughter is still the beef and leather is usually a very durable – lasting decades – and natural product and the alternative is plastic products that just cause more microplastics build up on our planet. A good pair of leather shoes can outlast like 5-10 plastic sneakers. So maybe there should be a different set of rules for leather. I don’t know