It takes a lot of effort—on the order of 1-2 hours per video, from my experience—to translate a video into a blog post in a better-than-just-a-transcript form.

For me, I do it because I like writing more than I like making videos, and I know many people appreciate it.

But my blog maybe makes a few pennies a month, whereas my video content provides my full-time income.

So I'm not surprised most content creators who can, move to video-only. It's only out of passion for the written form/blogging that I still do my text posts :(