You could work out the risk for yourself and openly discuss anything you think might be an issue or a concern.
It has everything to do with the fact that employees (even past ones) are not supposed to share anything from back of house, full stop. They sign media policies and disclosure agreements. You can see anyone who does tread a fine line between ok and giving away too much that might raise the ire of the parks or management. Often this information is shared with people who want to respect the source and the trust placed in them to keep certain details private. Its pretty much how any info makes its way out from behind the scenes.
So coming out and detailing in full why things are as they are, or why they do what they do probably isn't going to happen. Not unless its obviously been outed by someone else and its no longer confidential.
You have to appreciate there is a difference between discussing the impending debut of a new churro cart vs things surrounding operational procedures, safety or incidents that may have a legal responsibility attached (on both sides).
Sometimes you just have to settle with what people are prepared to talk about, and hopefully there is enough info in their posts to understand the person is probably telling the truth.
Or you don't. But its probably not going to change their feelings on the matter.