Well, since3 were being emotional and irrational, which would you prefer then? Guinea-pigs being put down in labs or someone you love suffering from Alzheimers, cancer, HIV, or any other deadly and still incurable disease? It would be lovely if we could grow the necessary tissue in labs to provide safe, animal-free testing subjects but we cant, not yet. So we have no other choice but to use the next best available - live animals. Unfortunate for the pigs, but it is very much the lesser of two evils.