This seems like a fancy way of saying “it’s a cheap approach to make animal feed taste better, so the animals eat more and thus gain more weight/produce more milk/etc”.

What impact would pouring a bunch of refined sugar on animal feed have on feed conversion efficiency?

What do studies on humans say on the actual real-life effects of people using artificial sweeteners instead of sugar?

If you permit me to be a bit glib, if we outlawed everything that people think tastes good, almost no one would overeat, and we would have solved obesity. Without going to that extreme, surely there are other interventions that can help limit the problem of overeating, and isn’t there evidence that artificial sweeteners are actually helpful in doing that? Remember that the starting point for humans isn’t hay and the slop we feed to pigs, it’s ice cream and McDonald’s.