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