Yeah, I see what you mean. But even if it gets the correct letter shapes, it's still nonsense right? It's writing as a visual feel, not anything actually written. Maybe in a sense writing is more difficult to do for image generators - a piece of paper with written text is much more information dense than, say, a patch of grass - especially if it's integrated in a scene.
I always thought that it's weird that AI struggles with text, just as in my dreams. Every time I open a book in a dream, it's jumbled and nonsensical and I can immediately tell I'm dreaming.