> One possible solution is to fundamentally alter what we store. Rather than writing thousands of words of prose, we could use Wikidata to automatically generate articles.

This is in fact being proposed at https://meta.wikimedia.org/wiki/Wikimedia_Forum#Proposal_tow... by a prominent Wikidatan. (Edit: follow up at https://meta.wikimedia.org/wiki/Wikilambda and https://meta.wikimedia.org/wiki/Talk:Wikilambda .) However generating sensible articles would require expanding the current Wikidata model, and this is something that should happen gradually and be managed by the WD community itself, not at a separate project. The whole pretty-printing-in-natural-language part is the most speculative by far, and incubating it separately makes more sense.

It's worth noting that Wikidata itself is not "deletionist" other than as implied by verifiability- and sourcing-requirements. Its model is far more general and far more "inclusionist" than even the most permissive visions for Wikipedia.