As a reader, would you ever prefer to be given the AI-fluffed version instead of the outline? I say if you have a few concise bullet points of the point you want to get across fantastic, let me read them and be on my way.
If on the other hand your mission is to produce a proper creative writing work where the choice of words is the art, then if you don't do that yourself what's the point?
This is something I've wondered for a while too. Like Notion's AI has a "make longer" button.... why would I ever want AI to arbitrarily fluff something up adding extra words unless I was a kid writing an exam and needed 3 more pages? I can't find any legitimate use for that feature.
EDIT: In case it's not clear, No. I would rather read the shortest version possible than one fluffed up by AI to make a word count. As far as creative stuff goes, I'm not sure that I've seen a situation where AI made something interesting enough that I'd want to read extra words from it.
But having AI extend your notes includes all the loss of the initial summarization, with extra AI randomness on top. It can't recover the information lost in the summary, that's what makes the summary lossy.
It can, in the way you can follow the abstract of a paper with its body. Don't forget that the model has access to the original text; it's not just going off the summary.
If on the other hand your mission is to produce a proper creative writing work where the choice of words is the art, then if you don't do that yourself what's the point?