Yes, the first 80% of a subject is repeated everywhere (including all the misconceptions) and you cannot go deeper except if you got very lucky like found a 5 year old youtube video with 130 views or an old blog post or a downvoted reddit comment. This is what makes internet so addicting to me, the small chance of finding these hidden gems inside mountains of garbage.

Having 80% in a broad amount of subjects is basically worthless, it is the 90% and further that have value because it took luck and actual personal experience and effort to take it that far.