It's not true that "giving them everything they want to and don't ask anything in return" is necessary to receive an emotional response as the ones that have be

It's not true that "giving them everything they want to and don't ask anything in return" is necessary to receive an emotional response as the ones that have been described here. That's not even a good approach to educating a dog. A dog will be very happy to comply with any of your commands just to see you happy with him/her/it, no treats required (although these help in early stages). But I think the point is that you can treat any other animals in the way you mentioned ("giving them everything they want to and don't ask anything in return") and you don't get the same kind treatment from them than you would from a dog.