Yeah, generative AI can create cool looking pictures and video but so far it hasn't managed to create infinitely engaging stories. The models aren't there yet.
I haven't added any words or phrases to it in years, but I still use it regularly and somehow it still surprises me. Maybe the Spelunky-type approach can be surprising for longer; that is, make a bunch of hand-curated bits and pick from them randomly: https://tinysubversions.com/spelunkyGen/