As the saying goes, "If I'd had more time, I would have written a shorter letter". Of course AI can be used to lazily stretch a short prompt into a long output, but I don't see any implication of that in the parent comment.

If someone isn't a good writer, or isn't a native speaker, using AI to compress a poorly written wall of text may well produce a better result while remaining substantially the prompter's own ideas. For those with certain disabilities or conditions, having AI distill a verbal stream of consciousness into a textual output could even be the only practical way for them to "write" at all.

We should all be more understanding, and not assume that only people with certain cognitive and/or physical capabilities can have something valuable to say. If AI can help someone articulate a fresh perspective or disseminate knowledge that would otherwise have been lost and forgotten, I'm all for it.