I'm trying really hard not to be judgemental about this...

Until we invent some sort of matrixesq knowledge transfer, the printed word is hands down the best technology we have to transfer knowledge from one human to another. If a student finishes their education, and is so uncomfortable with reading that they never read another book, we have failed them.

Images / Video can be useful to convey something which is hard to describe in words, but books give an author the ability to dive in much deeper depth on a subject than a video ever could.