They answer questions all the time. Go through any recent blue post in the Classic forums.
Examples:
All of these are direct responses to people’s questions and comments.
And again, this is precisely the place to ask questions. The Classic forums is where one would go to do that. Where else would you go to do that?
“You think this is an AMA?” is honestly kind of a dumb thing to say because yes it’s the closest thing we have as far as communication with Blizzard goes.