I have repeatedly used the example something common like MARGARINE. For decades the medical establishment told everyone it was the “smart” thing to eat. Now many years later we know what horrendous advice that was. Millions suffering from disease due to transfats. Many dead from that advice.
BOOM, headshot.
Game, set, and match.
Extra Credit: find some authoritative "Because Science!โข" posts saying margarine and high-carb, low fat is better for your cardiovascular health, from the American Heart Association and/or Harvard.
Then shove that and the vaccine UP THEIR PANDA.
You know, I was the only one in my circle that repeatedly observed “any dairy product that does not need to be refrigerated is not really food” and suffered the usual abuse and derision for my efforts. AND no one has ever thanked me or apologized for their mindless embrace of conventional wisdom. C’est la vie