The problem has always been one of maintainability.
The Wikipedia toolset produces a range of articles, some are of good quality, some improving, some hopeless, and a small amount positively harmful to the subject. Sure, even the good ones may be wrong - but wikipedia, in fairness, never claimed otherwise (or not much).
The problem is that the community has never accepted that the same "eventualist" toolset does not work for lower-notability biographies. The motivation of those gaming the system is higher. The potential damage greater. The "bad apple" rate is higher, and unlike on Pokemon stubs, ethically unacceptable.
However, wikipedia will not change because 1) too few people accept that damage to third-parties should feature in the equation. 2) there's a silly "free speech" notion still hanging about, whereby people think wikipedia should be as free in its choice of subject as the press, without any of the accountability of the press. 3) Maintainability has never been accepted as a factor in retention discussions. That something can be fixed into a fair neutral bio, does not mean it will be, or will be maintained as such. Systemically Wikipedia cannot fix the proportion of bad bios. But when you say that, people ask for an example and then proceed to fix that one, forgetting that those fixes simply don't upscale.
A "bad example" right now is
this afd which will result in a keep - ignoring the fact that Wikipedia has thousands of articles on lowgrade neo-nazis, mainly sourced from ADL style websites, and "maintained" by liberal activists. It will keep these because the wikiscientists do their sums with sources and work out that xsources*WP:NOTABILITY * WP:WTF = article. They never ask the maintenance question.
Wikipedia is not capable of maintaining 300,000 lowgrade BLPs without an unacceptable libel rate, until it stops trying nothing will fix.
Flagged, semi-protection etc, may reduce the fail rate marginally. Removing the 50% of BLPs that are at the lower-notability, underwatched, poorly sourced, and higher impact (because they are the only net source on the subject) is the only solution.
But Wikipediaots are more concerned with vandalism on Palin and Obama, people they can't actually hurt, because it embarrasses them more than Joe Soap who is being libelled by his editing ex-employee. (Why does Wales get upset about a dead Kennedy - who will not be hurt - and not about the average victim? The only concern is PR.)