Whether true or not, what sense does it make to talk about literacy or reading comprehension
to those who can't read and prefer to remain as ignorant as they actually are?

Your point is well taken, and thanks for the laugh, Observer; however, despite its uselessness, it's sometimes soothing to call it like it is.

"When ignorance gets started, it knows no bounds."
Will Rogers

There's plenty of evidence here in this forum to support that, as well as the quote below.

"The eye sees only what the mind is prepared to comprehend."
Robertson Davies