Yeah you keep saying this and, believe me, I understand why! But MGS 1, 3, and now 4 aren't like that. Nothing else about his career, especially that WARZONE shit, lends itself to the argument that he is really just some brilliant commentator on video games.
To be fair, MGS3 was supposed to be his final MGS game. He had less influence on MGS4 which is mostly Murata's work in terms of storyline but there's a rumor spreading that Konami is pressuring him into doing MGS5. MGS2 was an excellent mindfuck ending for the entire game world and MGS3 did a good job wrapping up a previously untouched character but the rest of the series could have stopped there. Portable Ops did very little in terms of story other than subtly hint at why Big Boss went insane and how he had so many soldiers to back him up and MGS4 just seems to be a fan wank as it brings back every character that didn't die in a previous game.
The thing is, from a video game standpoint (which is where my "brilliant" remark comes from) he actually cares about delivering a quality product without focusing on unimportant things like top graphics and novelty features. All of the MGS games contain a lot of minute details and easter eggs that aren't present in other games and these little things are proof that the man is a stickler for design. I'm not going to argue plot because that's subjective, but the guy cares about the actual
DESIGN of the game which is a lot to say because most directors/producers of any entertainment medium tend to sit in high back chairs far away from the actual product and dictate what happens in the shadows.