Braid is supposed to be a brilliant game. No one, in all the analyses and criticism and essays I've read about the game, has ever adequately explained to me why Braid is brilliant. I can only speak to the demo that completely failed to entice me into playing any further. I wasn't interested in the mechanic of turning back time. It felt like an exercise in throwing artistically-evolved sprites onto a Mario-esque platformer. I wasn't interested in collecting puzzle pieces of paintings. Maybe it was just a bad demo, or maybe whatever language the game spoke failed to engage me. That neither makes Braid a bad game, nor does it say anything about me other than I have individual tastes that a particular game failed to engage. Taking that discussion any further is unnecessary.
Blanket declarations about the intellectual rigor of an entire medium are equally unnecessary, and not very helpful. Those declarations do nothing for advancing the medium. They sound more like concern-trolling than an attempt to make things better. Artists don't create what they create because critics bludgeon them over the head with the shortcomings of their work. In the best of cases, artists create what they want because they want to, or because those are the ideas that develop organically.
Ken Levine didn't set out to make a game about Randian Objectivism that would become another Exhibit A in the games as art debate. He wanted to make a kick-ass shooter. The game's thematic content flowed from the design process, and we got BioShock. Thatgamecompany may design backwards from an emotional aesthetic they wish to capture but did they create Journey because it was personally important to them, or because they were on a crusade to please the critics?
An indictment of the dumb also feels like an indictment of what it is to be human. The joy of enjoying dumb games is the joy of play. Sometimes it's okay to be dumb, because sometimes that's what we need, and it's no surprise that our entertainment waxes towards the simple and the silly and the absurd. Calling this "juvenile" is to suggest adults have less of a need for these escapes than children do. I might argue precisely the opposite. There's nothing wrong with the frivolous if it fulfills a need, and if instead we need something emotionally or intellectually fulfilling from our videogames we can find it. Those games do exist.
The hilarious irony of complaining about videogames being dumb is that if the goal of the critic or journalist making the statement is sincerely to try and make things better, their statement is dumb in and of itself by Clark's definition. That's not a very intelligent way to go about addressing the issue, especially if it's a journalist or critic who can command page space in widely-read outlets. The best course of action is to continue throwing a spotlight on the game developers and their games that fit whatever criteria for smart is being described, and to throw that spotlight sans the mud-slinging toward everyone else.
Address gamers directly with reasons why they should play these games and give them context for understanding why these games are smart in a language gamers speak and comprehend. The worst sins of the intellectual are the assumption that beings of lesser intelligence can't "get" what is being said, and the laziness to not break concepts down into pieces that just about anyone can understand. If any critic wants to make a medium better their first job is to educate and inspire discussion. Otherwise it's all just self-aggrandizement and mental masturbation.