"Open letter" is just another way of typing "Unpopular opinion".. and the only way to properly deal with these threads is to ignore them.
I take it as the following:
This is a message from the Queen.
I got something more important to say.
I want to write you but I also want to let others know what I write. In other venues people think it gives them additional leverage doing that vs a private letter.
FWIW this is an open forum and we're all writing open to Larian and everyone else.
It feels snobby to me even if that isn't the intent.
Oh well...