Having spent some time working in an animal research lab, my initial raction was it is one more effort to eliminate people through automation. Then I remembered that we had to spend as little time as possible in the rooms with the animals to avoid having any human influence on the tests.
I suspect though, that the occasional fascinating experiment will still draw curious technicians in for a glance at the experiment. Mice on LSD comes to mind as an example that had everyone laughing on our lunch hour.
Victoria Silverwolf raised an interesting question, although its phrasing suggests it has been discussed elsewhere.
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From a moral viewpoint, it brings to mind the question as to whether human beings should use other animals as test subjects.
During orientation for the above mentioned job, I learned that human beings were originally used as laboratory test subjects. Condemned prisoners werre sometimes given the option of being a test subject. The first recorded instance of such a test using a human was to determine if coffee was safe to drink. It's been 35 years since I read about it, but I believe the condemned man was sentenced to drink a quart of coffee a day until it killed him. He outlived the king that sentenced him, and 2 or 3 successors.