I think he's just being silly and doesn't truly think the game is anything but a kid's toy.
Not sure if he ever played the game? He does own many copies. I don't recall some of this in the box. Was it made in a second version, was all this in the original MB game?
I do recall the furniture. Agree, those are nice for Dungeon crawls. We used them in the Monster Bash. I also like the roll three dice verse two defense. But Q&D is more evocative and useful.
I believe Squires ran all the scenarios of H.Q. Frankly, a game I once owned but never played.
Final survey question -- Is this guy the ultimate OSR player? Is he the role model all aspire to be? I ask for a marketing friend.