My argument is that my prior experiences seem to work better for guiding my meal choice than all the formal knowledge presented to me.
To achieve that, you needed to have enough confidence in yourself and your ability to measure and feel stuff (which some people think is bad, apparently) versus some consensus which purports to know better.
Courageous new science regularly blasts old knowledge and education to bits, and that's a good things.
If "knowledge" was only what you were presented in primary school, the world would be a very different place.