[thereisnospork]

I'm sorry but that is nothing but a gross oversimplification of the topic.

There is neither lack of effort nor lack of incentive for human-analog testing ( which would lead to curing cancer, weightloss, hairloss, vaccines, etc. etc. etc.). You can't just write unit tests for the real world. Please do some reading before you try and hand-wave away a whole field as trivial.