I completely agree, though they have an interesting policy where they themselves cannot be a primary source of information but can only quote secondary news sources.

The aim is to stay as impartial as possible, but the reality is that they remove hundreds of pages where the primary source of that info (usually a news website) is no longer accessible (archive.org or otherwise).

Right-wing news media can therefore win in the longrun by simply keeping their news sources always online and available for Wikipedia to source, since left-wing news media is more likely to have expired links.

The best thing for anyone to do therefore is to fund the archiving sites. Archive.org in particular is a crucial piece of news infrastructure keeping Wikipedia balanced.