What are the cons of animal testing?

It's murder and the animals have a right to live the lives they want to free. Also, animals nervous systems and such are very different from humans, and there are many alternatives that work just as well such as computer based human likeness' and tissue models that mimick how humans would react. In Britain, more then 60% of citizens say that animal testing should be banned. It's wrong and inaccurate, so why is it still happening? Many scientists agree that we should stop because the animals dont need to suffer on test when only 9% of products tested on them reach the market.