I struggle with this principle. Under typical circumstances it makes total sense (I want to begin and end with the fiction.) I can agree fully with "usually don't speak your move's name." But sometimes it's really helpful to provide a hint of the mechanical structure.
Especially when teaching the game, It feels important to create some transparency about what I'm doing as a GM, and always occluding the moves I make clouds that transparency. I want to be accountable to the rules of the game, and it's hard for that accountability to exist if the other players aren't sure why I'm saying what I'm saying, or by what rule I've been empowered to say it.
As a player, I like sometimes seeing behind the curtain. Too much consciousness of the structure is toxic, but just a glimpse here and there makes it feel more real somehow.
So: anybody else out there occasionally speaking their moves' names? Why do you do it? Why should or shouldn't I be doing it? Why do I like hearing the moves' names spoken sometimes?