That is a false statement. Actual mainstream research results indicate the exact opposite, but the authorities you cite disregarded the mainstream research and dictated a political contradiction and dictated a handful of cherrypicked data to confirm their political decision to adopt an anti-scientific conclusion.
There is a strong possibility that we are not all the same and our metabolisms and other features are not all the same.
Even in the same person, things change. I had a major non-biological event in Nov 1972 that changed my metabolism.
What was true in Oct ‘72 was not true in Dec ‘72.
So I can find a statistical population that proves a point; and another statistical population that dis-proves the same point.
In a free country, the question is whether it is democratic to vote with your feet, and with your pocket book. Or are we not allowed to vote every day and only allowed to vote when choosing politicians?