The latter part makes sense to me tbh. Machines should not allowed to compete with humans (in creative endeavours) because it is an intrinsically unfair competition that further erodes the rights of those humans who are more vulnerable, in the circumstance that is opposite to the intent of having machines around in the first place. They are supposed to do our beast-of-burden work, not make it so that our only pending value to be extracted by capitalism is beast-of-burden work.
What I'm not sure I buy is the idea that the "countless works" generated by AI actually compete with the original, in particular if they are non-infringing. Let's say I take the work of an author to train an AI on their style. The author writes exclusively noir; I instruct the AI to generate college drama in the same style. Are the new works competing? The author won't offer me a college drama in the first place.
I'm a simple person, I see DokuWiki and I install it some plugins. Easy to self-host on a cheap VPS (no database required!) or on your own machine (if you have access to eg.:Docker). But that's more for a general wiki kind of thing, useful but not specialized like having tools aimed for worldbuilding.
Haven't checked any of the offerings here but I'm told by a couple fellows that they've had decent story with Hammer. Would probably start looking there.