Yes, obviously AI is emitting way too much. It shouldn't even be producing 0.2% of global emissions, let alone 2%. My main grievance is that no one ever talks about improving industrial and agricultural processes even though they produce around 29% of emissions and 20% of emissions respectively.
Good point, however how much of feed agriculture does this sort of "feed from secondary products" make? It definitely helps that they produce multiple products from a single type of feed. Would also like to know if a person exchanges a part of their animal product diet with plant, does this actually reduce required farm land (after all then you need to produce more vegetables for the said person).