Because so far, three major Measles Epidemics have popped up because of bad medical advice sold by those unable to cut it in Medical School and discredited scientific papers used by scam artists and MLMs to sell false cures. Additionally, those selling false cures (most famous being the 'essential oils') and paying charismatic writers to create blogs as "medical insiders" and pay college students to create dangerous false news/propaganda videos like https://www.youtube.com/watch?v=cHWeJ0f_o3A that are unbacked by any research when the CDC and World Health Organization say these are safe. This is not just the matter of the children themselves, but the others in the community... children too young for immunization, the elderly, the hospitalized/recovering from surgery at home, people with autoimmune issues who CANNOT vaccinate, as well as the 2-5% vaccinated who's immune systems may not work with it who have no choice but to hope that Herd Immunity will keep them from being directly exposed to it. The Anti-Vaxxers think that Measles are just a rash or confuse them with chicken pox, ignoring the fact that before we had vaccines that Measles has killed before. Then there is Polio. Does anyone remember Polio? How about the iron lungs? Look at this: https://www.youtube.com/watch?v=gplA6pq9cOs and https://www.youtube.com/watch?v=y6ezbEW9QZ4 these are two of the last polio survivors in the US because Vaccines have stomped the disease out in the US and other nations that can provide the vaccines to their people. Would any parent choose this kind of life for their children over Autism?