You're 100% right on that, science rarely gives clear cut answers. I do know how right you're on that, it's clearly pointed how some people believe in their personal experiences far more than science. They often believe even other peoples personal experiences more.
"I was drinking wine all night and then drove home. It proves that drinking and driving is not dangerous."
"I ate cheese one morning and my car broke down. This proves that cheese can harm your car."
All we can do is to spread knowledge and hope more and more people will learn.