Uhm, I think you're putting a pretty fine line on it. He didn't explicitly connect the positive comments about the fey with D&D, but considering he was writing about D&D, I think the connection is implicit.
From a designer POV, as noted above, D&D is traditionally and primarily a game as he describes. It can be used for more than that, of course, but its focus has never been that and will likely never be that.
To examine your posts in as much detail, you claim that he "clearly asserts that D&D is a particular thing that does not include.." [bold added], which is not true. He states D&D is not about that, not that it can't include that. "About" here referring to the game's primary focus.
So he's saying D&D is not focused on traipsing through fairy rings, which I think is a fair statement. Then he says traipsing through fairy rings can be awesome, which is also a fair statement.