Doesn't that describe most good ideas in life? Things that are commonsense (especially after the fact), simple, seldomly well practiced because of human nature,

Doesn't that describe most good ideas in life? Things that are commonsense (especially after the fact), simple, seldomly well practiced because of human nature, and can be communicated in a few paragraphs but take years to understand? Kindness, democracy, business, performance in sport, scientific method etc. I don't know one good idea that can't be communicated in a page or less.