Why is no one taught the one concept in quantum physics which denies reality?

It’s called contextuality and it is the essence of quantum physics

Photo by Ehud Neuhaus on Unsplash
The Treachery of Images (This is Not a Pipe) by Rene Magritte. Do we see the world “as it is?”
Headline as it appeared in the New York Times in 1935.

Quantum theorist by day, father by night. Occasionally moonlighting as a author. csferrie.com