AI is significantly different from the other things you mention. With the others a human is still involved, and in fact indispensible, in the process of creating art.
Not so with AI (except of course for all the human art illegally used to train it). It is also capable of pumping out its creations at a speed no human can match. You search for examples in history of similar things happening, but the fact of the matter is that nothing in human history is equivalent to this. So using history as some sort of guiding light is quite the fool's errand. We can only judge by what is happening, and the reasons for those things happening, and extrapolate from there.
And judging from those facts then it does become obvious that automated content will very soon drown out all human made creativity, just from the sheer volume of automated content being created at exponentially larger rates.