Apologies for getting more off-topic, where I think we're not meeting, is I'm talking about displacement and the holding of that resource. Though we do emit, through each of the methods you speak of, water, we still hold onto a certain amount, until we die. Sure it's a smaller impact than other ways, but as the population grows, it's accountable. I think of it like setting up a saltwater tank, throwing some food in, and then humans are the bacteria. The growth starts, keeps going, and then grows to the amount the resources are used up. Then through the various ways those resources become available. (mostly death) But the population can never grow beyond a certain point.
It would be like confining people to a football stadium and you give them a couple swimming pools of freshwater along with some trees of fruits, maybe some pigs. At some point the population outgrows the resources available, including the amount of water to sustain.
Taking an average weight of 180 lbs per person, 60% water for an average, that's 108 lbs of water that entity is occupying while alive. Now grow that exponentially like the human race. That's 108 lbs of water that becomes unavailable for every person.
There's numerous ways the human race is screwed. Just like an empty tank growing bacteria that only received one scoop of food to begin with. (now go reread what I was talking about once we start utilizing ocean water, which has already started in some coastal cities)
Back to the movie, I'm sure it's just the beginning. So until we make some major initiatives to produce valid numbers of creatures, or even we as a collective group make rules/etc by which collector's should abide by, like someone said, the governments will eventually do it for us, and it will be extremely bleak at that point because we WON'T be able to attempt to, and possibly breed, some of those organisms that will be blacklisted.
But at the same time, if that were true, that WE can save the creatures, white rhinos wouldn't be <1000. (iirc they're <900 total in the world now; or insert any number of animals that have become extinct)