Is animal testing a useful predictor of human reaction?

Read this paper for a fascinating, compelling and thorough discussion on the predictive power of animal vivisection.

This excellent academic paper uses evidence from many decades of animal testing to argue convincingly that animal studies which test the effects of medicine and the toxicity of chemicals do NOT predict the performance of medicine or toxic effects in humans. The success of prediction is sometimes worse than tossing a coin, i.e., worse than random, and this is the case for even our closest relatives. Yet animal experimentation is on the increase in many places (The U.K. for example), and primates, dogs and cats are still used to this day in the US and Canada. Unfortunately, animal testing will probably increase with increased public pressure to test whether chemicals are carcinogens, as well as the toxicity of GMOs. While many top scientists have pointed out how ineffective animal studies are in predicting effects in humans, many scientists argue that they are "useful", especially when they can cherry-pick particular results to benefit their companies. This is a clear example of how so-called objective scientists who do "real" science, are completely blind to their own lack of objectivity and scientific credibility.

So if many scientists recognise how useless animal studies are for predicting human response, and considering that animal experimentation necessarily inflicts terrible pain and suffering to animals, why do they continue? I wonder if it is simply to whitewash the public, make us feel that the products and medicines we consume are safe.

It's hard to believe that I wanted to be a scientist. Of course, not all scientists have to be completely closed-minded, accepting of the status quo and unethical. Just a large proportion of them, like most human beings.

It's also completely bizarre to me how people can train to be vets, presumably out of some love of animals, and in the end be warped to support the status quo of terrible factor farming, slaughter houses, and medical testing. These vets supposedly do check-ups on these places, and turn a blind eye to the attrocities that they see there. The one thing that has become clear to me now is that people will generally just go with the norm, no matter how terrible and injust it is.