There is also no other animal that posts messages on the internet. I guess that's bad too.
Or how about liver flushes? Enemas? Juicing? Prolonged fasting? Religion and spirituality? Surgery? Reading books? Or a million other things that we've "discovered" that animals aren't capable of discovering (or doing, due to bodily limitations)...
Yes we can learn a lot about "how to live (in harmony with nature)", in a general sense, through animals. But there are many beneficial things we've been able to discover or "figure out", that animals don't have the intellectual capability to come up with on their own, or understand properly even if they were trained to do something (like, collect and drink their urine).
We are not on the same level as animals. We are a step ahead. Or at least, our POTENTIAL is. We have developed certain qualities that animals do not possess, such as the intellect and the ego. Now, of course, these are just "tools", and can be misused (as you see many people doing), but these tools also allow for us to reach a much greater potential, a greater level of being and understanding, than animals are capable of.
We can not look to animals as a strict "ruleset" for what is "right" or "wrong" for us, because we are functioning on a different level (though many people seem to be determined to lower themselves back to the animal nature!). Not everything that is "right" for animals, is "right" for us -- and also, there are many things that may be "right" for animals, but that they aren't sufficiently capable of discovering, because they haven't developed the necessary qualities to do so.
Now aside from that, I've heard of even animals drinking their urine in times of illness, so even that argument really doesn't mean much. Of course, it's not something you hear about often, and it's also not something most animals do, simply due to PRACTICAL reasons ... most animals simply aren't capable of carrying a cup around to collect their urine in, or "planning ahead" and finding some convenient location that would "hold" their urine properly. Some more advanced animals would certainly be capable of doing that, IF TRAINED TO, but it's not something they're going to come up with on their own. It's certainly not something that they would be very prone to "stumble upon" or "discover" by accident. They pee and it goes right into the dirt. The possibility for them to "discover" another use for it, simply isn't there in most cases.
The argument that "animals don't do it, so that's proof that we shouldn't" really doesn't hold a lot of weight. And interestingly enough, this is something a lot of anti-UT'ers bring up as their "proof" for why UT is bad. (And yet they fail to apply this "proof" of something being bad, to innumerable other things that we do that animals don't)
"The human body can only use live, fresh, nutritional things to repair and maintain itself. Waste products are counterproductive to life as far as the human is concerned."
This may be true, and I personally agree. But, the question then is whether or not urine is "waste", or whether it actually is a vital substance. You assume it's waste because that's what you've been conditioned to think all your life. But those who have done the research and on top of that personally experienced benefits from UT, know that it is not.