1. I've been finding in recent weeks that the camera symbols are sometimes displaying incorrectly. So you should you try to click on camera with key and microfilm symbols.
2. If the record custodian does not know why the records are restricted, then FamilySearch's arrangements with Ancestry.com, FindMyPast, MyHeritage and others are probably the reason. Since 2014, FS has agreed to restrict some records in exchange for LDS members getting free subscriptions to those websites. I've contacted record custodians from time to time about restricted records, and twice they were genuinely unaware of the restrictions but knew that there was a second contract between FindMyPast and FS . The custodians were the British Library and the Leicestershire County Record Office.
3. I'm a non-LDS volunteer for FS, so I strongly object to people saying that LDS "deserve" more access to records than the general population. FS is a volunteer run website and all of its users have the opportunity to donate, either financially, by Indexing, by editing the Wiki, or at FHCs.