While I recognize the AI art is quite obviously derivative and considering that ML pattern matching requires much more input, there’s argument that it’s more derivative, I really struggle to grasp how humans learning to be creative aren’t doing exactly the same thing and what makes that ok (except of course that’s ok).

Maybe it’s just less obvious and auditable?

Obsidian is close.

It’s a little higher barrier to entry w.r.t. saving without a title, but it has a “Daily Note” feature that gets you very close to your quick need.

Benefit is that it’s also really powerful if you want to get fancy.