First, I’ll respond to the OP on a per-reason basis.
Reason 1: Some things aren’t well explained. (I’m broadening this to the general API docs not just libraries here) We know – that’s why we have this forum category: so the community is in control of the spotlight about what needs improvement. Being a department under developer relations, the IX team has direct access to other teams at Roblox which the community does not normally have access.
If something needs an example, yes, you can write one right now! Put it in a post here, and let us do the work of getting it on the Hub. Is there a description that’s too complicated? Tell us, we can make it simpler. That’s why we have this forum category! If you’ve got expertise on an advanced subject, we have public community tutorial topics ready for your pen.
Reason 2, which I’ll rewrite as “extending the reach of community written content”. I think it’s a good idea that we could feature the best of the best via links on the hub to the forum. I’ll see if that can be made possible. In this way, you can retain control and the credit over the content you write. Search engines index results plenty of results from the forum!
Reason 3, the minutia: we’ve got a mega-thread for this where these can be fixed in bulk (see the stickied post). Typos may be low on the totem pole, but we’ll get around to them. More serious stuff, like broken code samples, will be fixed when we find them. We make every effort to make sure working, tested examples get on the Hub; however, content migrations from the wiki still exist in many nooks and crannies, which you guys are great at finding.
Reason 4, internationalization. We’ve built systems to efficiently translate the hub’s content by humans. You can still post your self-authored content to the forums in the appropriate language topic!
Hope this properly addresses why hand picking community members generally won’t work for the hub (you can message me directly if you have further questions). In my experience with the IX team, Roblox is more keen on hiring such help rather than hand-picking community members to do it for free like in the ye olde days of the wiki. @Maximum_ADHD, who was a huge help with both the wiki and the hub is proof positive of this.
This topic doesn’t seem to be going anywhere productive and has devolved into a rant about “old wiki better”, so I’m locking it. Whenever you find an issue, whether it’s missing or incorrect content, I implore you to tell us about it here. As a reminder, please be specific when doing so. “More examples!” doesn’t help as much as “More examples on RopeConstraint!”