I heard the phrase "profoundly ignorant" used by a TV business commentator in describing a magazine article. I really liked the phrase.
That made me think, too.
I have been and am profoundly ignorant about any number of things. A few of these I know now after learning something about the subjects. But the vast remainder I know not.
That's because it takes a certain amount of knowledge to raise one's level of ignorance to the profound level.
Otherwise one is simply blissfully unaware.
Nothing really wrong with that as long as it is maintained privately.
After many years of negative experience it is my conclusion that the trick is to attempt silence regularly and consistently in order to shield from public notice the depth of one's own stupidity. That way the public is safer.
Not that I have arrived mind you but I am trying.