Simply, after some time, these innovations will no longer be new, and it will be necessary to revert the changes.
When, during training, an animal receives punishment for a correct action, or a reward for an incorrect one, it disrupts all learning. And not only in animals, if you encounter such a contradiction a couple of times, you will stop respecting the rules altogether. For Heroes players who play often and know every word of the rules well, this is not a problem - they remember when a version changed and the latest changes, so it seems insignificant to them (and to you). But it confuses the rest.