I'm not familiar enough with Reddit to understand why an automated summary of an article is needed. Whether it's appreciated or not, that sounds by the description like a bad use, with a high risk of contextual collapse that goes uncorrected in discussion.
As for auto-generated captions, I agree those are better than nothing. I'm not sure, though, that the pre-ChatGPT speech-to-text generators are the same type of automation as "AI". That tech has existed for decades.