I have thought hard about what to say to this, but I can see that your mind is pretty set on the way you see things. And I think there may be other issues behind the scenes here given some of the things you wrote, so I don't want to push things. I do find it a little sad though that you feel animals don't have a depth of emotions simply because they can't speak a verbal language humans can understand.
A good number of zoos have varying levels of discomfort dealing with other humans as apposed to the perceived non-threatening nature of animals. But at the end of the day if your not bringing harm to the animal, what we personally think about them from a humans perspective probably isn't so important.
If I was a dog I would probably be just as perplexed at why humans spend all that time yapping at each other, where as a good butt sniff can tell you so much about what the other person as been up to and where they have been that day, as well as what they had for breakfast and so much more.