This reminds me of Seneca.
Your modern parables give a better frame for some of his advises:
“Set aside a certain number of days, during which you shall be content with the scantiest and cheapest fare, with coarse and rough dress, saying to yourself the while: “Is this the condition that I feared?””
I agree that often the best don’t rise to the top, but you have bad examples here.
You are confusing expertise in different domains: just because one is exceptional in something, it does not follow they are good at teaching it or making videos of it.
This is especially apparent in Bottura’s channel. He might be the best chef in the world, but his youtube content is mediocre.