No, and doubly so on the second. SEO = search engine optimization. Big corps pay people to manipulate themselves into the top hits of searches; I don't see Lemmy ever doing that.
The top hits will be from companies that scrape the Fediverse for content then poop AI-generated slop into "top hit" positions they paid Google for.
I skimmed the wikipedia articles for both hard and soft scifi, specifically the representative works sections. Both list Jack Vance's The Languages of Pao. And that pretty much covers my inability to differentiate between hard and soft and par-boiled, stir-fried, fluffy sci-fi.