Board Thread:Support Requests - Getting Technical/@comment-4151266-20150704034245/@comment-452-20150708225752

Special:MyPage is not a real page, it is a redirect. I know of at least two others which aren't listed there, such as Special:Userlogout, and there are probably more.

The point - as I already mentioned - is that regular contributors can access Special:SpecialPages and cannot access Special:AdminDashboard, so that's irrelevant.