The plague of shallow understanding

With the internet, everyone has heard of everything.

You introduce an idea, someone will say they have heard of it.

No matter how new or foreign it is, someone will claim to have heard of it as if they truly knew it.

And this is apparent with common wisdom.

So many people have heard of great wisdom/advice for relationships, life, career, education. Yet how many people have followed one piece of it?

None.