can't we use Machine Learning models to stop all the animal suffering?
Possible that such edge cases could then be treated with more elaborate models, but edge cases still present a problem. There were antibody examples where primates had no problem while humans damn near died. Pharmaceutical advancement will be much slower and lawyers’ purses much heavier.
Many personal care products that advertise they are not tested on animals simply use conservative choices of ingredients that are believed to be safe.
Some people have it worse than me but many personal care products that are allegedly safe cause me to break out in hives.