Because as a publicly traded company you’re obligated to maximize profits for the shareholders and if you were a pharmaceutical company where one division gets litigated to death while the other division is free from litigation, which division would you invest more in? And if you were going to do that, surely you’d lobby to get your products in every pediatricians office and ensure the public school system enforced them.

Look up the National Childhood Vaccine Injury Act. Then look at the number of vaccines introduced since then.

Then look at autism and autoimmune disease rates since then.