You can be pseudonomous on Wikipedia. Also, some experts are so deep in their field of expertise that they assume others to be knowing something they take for granted. (I am not a Wikipedia editor.)
It doesn't have much to do with your public identity, but rather with how experts in a field tend to write about that field; they make assumptions that are universally accepted among practitioners, but aren't obvious to lay readers, and Wikipedia tends to challenge those assumptions.
I guess hiding your identity is a way to cite your own stuff there.
I guess hiding your identity is a way to cite your own stuff there.