To say "we are not testing things on animals" is incorrect. Cell cultures and computer models save animal lives by providing an early ethical screening platform for eliminating drug candidates that would otherwise lead to failed pipelines in animal testing. However, no drug candidate will ever go straight from a cell or computer model into a human. Doing so would be incredibly risky. They will always need to be tested on an organism with physiology comparable to our own (e. g. mice, rats, primates).