I am against any training and/or captivity to be honest. Been to Kruger (SA) and Ranthambore (India) and it makes you
realise how utterly sad it is to train/make captive any animal.
I'm surprised you have to ask this - in fact I'm staggered. But here's one for you to ponder:
They don't have to aggressively and cruelly train a bull to walk around the pitch. Oddly enough
it is born with that ability.
Bearing in mind your post - does that make sense?