My wife uses Facebook and I beg to disagree with you.

I use Facebook: my experience is it's probably 50-50. Which means far more content (by duration or bandwidth) is images/video. I rarely look at the videos.

As an erstwhile small business owner it became very clear that business page posts with images always get more views so all informational posts always have images if you want to improve your engagement scores.

Most friend posts that are popular enough to spread to me include a gallery or shared video.

People make text comments on news stories and link a news website, which then pulls in an image/video. So often the headlines/images are misleading - as one finds on HN too.

I used TikTok for 6 months or so, even posted a video. To me the only content was ever goofy dances, magic tricks, acrobatics and 'pranks'. No more harmful than any other human-targeting Skinner Box.

Does your wife heavily use tiktok? It's possible that different cohorts of Facebook users experience the product in different ways. I can imagine that those drawn to Tiktok also make use of insta stories or fb stories (short videos) etc.

Your feed is customized to your interests. Some people get lots of words, others just get images, livestreams, and videos.