Ultimately, if the OP wants "the editors" to see information to add to the article, they will effectively be publishing the information publicly, since anyone can be an editor, and there is no mechanism for protected sources that are available to only some special cadre.
That breaks the Wikipedia model -- in article namespace, everyone should be able to review the same source information. The concept here is called "verifiability" for a reason. Wikipedia's strength is that you can ultimately go check and confirm the source.
By writing articles from privileged information, Wikipedia effectively becomes a primary source on a subject, which is a big no-no for an encyclopedia in general, and for Wikipedia specifically: https://en.wikipedia.org/wiki/Wikipedia:No_original_research
It can be frustrating, but it is a necessary minimum. As to perceived accuracy, Wikipedia has a General Disclaimer[1] for a reason.
If this all makes you less trustful of Wikipedia... good! I can't speak for every wikipedian, but I personally welcome skepticism and encourage users to verify anything they have doubts on.
[0]: https://en.wikipedia.org/wiki/Wikipedia:Dispute_resolution
[1]: https://en.wikipedia.org/wiki/Wikipedia:General_disclaimer
Furthermore, any sane editor would allow use of this information under Ignore All Rules (https://en.wikipedia.org/wiki/Wikipedia:Ignore_all_rules ), which is specifically there because sometimes the rules don't produce good results.
Now, if there's something in the article that is (1) wrong and (2) unsourced, then that should be removed from the article. (And if someone re-adds unsourced material to an article, then there are process to deal with that). But if there are no public sources for information it does not go in the encyclopedia.