Reposts, not articles themselves. Reposting someone else’s writings from the web as a link is objectively low-effort work that could be handled by a dozen-line script.

I don't know what you're referring to. Copy-pasting content instead of linking directly to the source is frowned on for numerous reasons.

a general-purpose forum. I go to Lemmy/Reddit to ask a question (e.g. how to repair a thing), voice an opinion, start a debate, talk about stuff, read comics, etc.

Sure, that's a secondary and perfectly valid use. The OP of this thread posted an image promoting memes. That is what I criticized.