Musaiga
6 hours ago
"This stuff cost too much to make. We need to recoup our investment. Screw logic, let's have actual Human Beings Beta-test this shit."

Isn't that the long and short of it?

I worked in Human Blood and Plasma manufacturing. I assisted in the processing of all that "donated" blood plasma. Also worked in R&D with Hemoglobin.
We had a whole testing facility, detached from the main factory by about a football field. Sterile, albino Rabbits were bred especially for testing. By "sterile" I mean they were raised in a 100% sterile environment, no viruses or bacteria. Each rabbit was injected from a separate lot of product to determine whether or not it would cause a fever in the rabbit.

Therein lies the "test". Mandated by THE FDA!
Used all caps there so the readers from PETA could grab a Kleenex.

They seldom die. But alas, they cannot be given away as pets. Besides the obvious ambulance chasing theory, there's this. They have no antibodies, to anything. Zip. Zilch. Nada. Like AIDS in Rabbits, only more accurately BFZI (Bred for zero immunity). This means they would last a week maybe, in the real world.
I'm going in to all this, because I loved your explanation Ward. Thought I'd add a direct example here.
In those days employees could sign up for tours of our "animal facility". The explanation I just gave was pretty much from the mouth of the Department Manager, who was leading the tour. This was the late 1980s. A biological "She" manager who knew her stuff, and showed real affection towards them critters.