I wouldn't bother so much about the SEO angle as that's site owner's concern if they wish to help search engines understand them better and/or try game them - I'd say wrt search engines it's about the fact they're still the single largest primary driver in how people find new pages, and generally how sites get seen 'organically' without paying to be seen.
Yes, it's cool that the entire dataset is there to be downloaded and used as you please. I have a parser written for it as part of a knowledge graph- don't get me wrong there's good things about Wikipedia I think it just came with collateral damage. Case in point is just searching for any wikipedia title and seeing where it appears in search results, also most of the "knowledge panel" results in major search engines are derived from Wikipedia/Wikidata and deprive the original content creators of their visitors.
Yes, it's cool that the entire dataset is there to be downloaded and used as you please. I have a parser written for it as part of a knowledge graph- don't get me wrong there's good things about Wikipedia I think it just came with collateral damage. Case in point is just searching for any wikipedia title and seeing where it appears in search results, also most of the "knowledge panel" results in major search engines are derived from Wikipedia/Wikidata and deprive the original content creators of their visitors.