Is this really content?

Content must first and foremost generate engagement. The medium is in fact irrelevant.

That being said, you can make some very impressive content with text only!

Iirc, it's a quote from iCarly, but I remember a character that is the archetype of being dumb and brute saying in awe, after reading a book, that "it's like a TV in your head", or something of the sort.

But worth noting places like Lemmy and Mbin support images too.