Ai can't write anything sensible. The way how it writes is like if a human was trying to write novel in chinese language. It will Tate random sentences from random christmas related texts and throw them into one story.
Ai does not understand what it is doing. It only drops pieces of text that have some semantic relationship to surrounding text.
The only useful thing Ai could here is to enhance human written text by adding extra descriptions or replacing words with synonyms. sometimes it can give generic suggestions, like you mention that cannon was shot and it will add extra sentence describing how the cloud of fire ofsmoke erupted from the batter making steel projectile fly and hit the target which was obliterated and shattered into pieces. this will be also not really some original text but rather a quote from another text where cannon fire was mentioned.

This woud be pretty useful for role playing because many people are asking for longer more detailed replies.
But also you need to check what AI is suggesting because it can drop something absolutely ridiculous just because that text was relevant somewhere else.