My opinion is that it should be inclusionism and not deletionism. Include many thing as needing.
> Actually, I've seen "the content is already available in another website, why do we need it here?" being be used as an argument against reinstating some very uncontroversial articles.
Having it on Wikipedia is helpful. This way, you can find it in Wikipedia, can have a free license, mirrors (if there are any), can use MediaWiki API, and will have the wikitext you do not worry as much about the hostile JS/CSS and can also print out. And, you can also fix it if there is a mistake in the article, too.
They should also try to be neutral from corporate or other interests (although if there are multiple points of view about some subject, they can try to be included if you can avoid being biased, but in the total it should be neutral).