To say you can simply shrug off differences about medical fact as outrageousness or controversy is to feed the belief that science in general, be it about vaccines or climate change or evolution, is subjective: you have your truth and I have mine. But it isn't. The earth didn't revolve around the sun only for Galileo. The problem with treating factual matters of science like opinion debates is that, as soon as you do that, antiscience has already won.