You lost me on the milkshakes, where's the cause and correclation?
Then at what number of aware people do you see a correlation?
If you and I and a hundred other people come to a conclusion it needs to be investigated.
It may not always lead to causation but it is evidence that needs to be examined to be ruled out.
People used to say the same thing about the Cannabis Oil and now it has become common knowledge it does help with many things but we all had to wait for science to tell many of us something we already new. Kind of like the Milk Maids that contacted CowPox to find they were immune to Smallpox, I'm sure it began with Correlation does not equal Causation but eventually it was proven otherwise their was . If no one looked into this correlation we would have never know, it all has to Begin somewhere to find the cause.