You could argue such phrases have no place in life considering any action has risk and could lead to injury or death. There are plenty of risky activities that people do everyday and don't so much as bat an eyelash: drive, eat, use the restroom.
It is unfortunate that some people have complications to vaccinations, but it's the reality of living in this world with viruses. I don't blame parents and sufferers for seeking comfort amongst others with similar afflictions. Such groups are easily manipulated and radicalized towards the agenda of a few outliers. It's alot easier to be angry and vengeful towards something very much out of your control.
The power and lie of the anti-vaxxer campaign is that you have control over the situation. You only control the decision of getting vaccinated and everything else is up to probability, nature, and time. But getting vaccinated means improving your modifiers overall v. not.