Parents don't always know best.
And lets be brutally honest.
50% of the UK population is by definition less intelligent that average IQ of 100. Many people would consider 100 to not actually be especially bright...
Added to that humans are also terrible at assessing risk and probability. Most people don't understand statistics. Most people don't have access to decent peer reviewed research papers on medical matters. Most people haven't got the science and other educational background required to understand such papers.
Basically most people need to back the fuck away from the keyboard and their 'evidence' on daily mail (at best!) and at worst dedicated anti-vaxer 'this is the REAL TRUTH they tried to HIDE from you' click-bait websites.
We are also dangerously close to a post-antibiotic world. That, combined with a rise in people not vaccinating will make developed countries scary places to live again. Where you worry your child will die after they came into contact with a sick kid at a party, where you might die because that cut on your leg has become infected.
Plus the climate change emergency and the rise of far right politics, well it is all a bit depressing.