Being ignorant is not so much a shame, as being unwilling to learn.
So, what are these costs of ignorance, and who pays the price?

When someone demonstrates ignorance in a particular field, subject or fact, it means that the person lacks the know-how about that subject, which might be due to a lack of education, learning, training, awareness or experience.
But the most dangerous aspect of ignorance, is the outward show of knowing. Pretending to know things that you barely know about. It’s important to remember that sometimes its virtually impossible to teach someone something, because their mind is not capable of understanding, or that perhaps they cannot see the difference in right and wrong.
And many times they are incapable of making the decision and they know this deep in the hearts, but still outwardly the show they understand. The strangest thing is some-how even without knowing they are still able to fool the world, that they some-how know.
Which reminds me of a speech of Hazrat Alī ibn Abī Ṭālib-The Final of the Rashidun
“Society will pass through a period when cunning and crafty intriguers will be favoured by status, when profligates will be considered as well-bred, well-behaved and elegant elites of the society, when just and honest persons will be considered as weaklings, when charity will be considered as a loss to wealth and property, when support and help to each other will be considered as favour and benevolence and when prayers and worship to Allah will be taken up for the sake of show to gain popularity and higher status, at such times regimes will be run under the advice of women and the youngsters will be the rulers and counselors of the state.”