I guess it has to do with the lineup around him. I dunno. If it's just numbers then I am forced to agree with you but some other things make me vote for him.
I believe that among most writers, and a decent amount of fans generally agree that the Cy Young should be awarded to the best pitcher, and not necessarily the best pitcher on the best team. At least, I believe that's how the process goes now.
I don't think Kershaw is under any pressure. I'm not as impressed by his team. He's having a great year. I'm just more impressed with Kennedy.
I don't disagree with the last sentence. Perhaps that since Kershaw was predicted to be good, and is living up to expectations, while Kennedy has exceeded his, meaning that his season has been more impressive? I can agree with that.
But...Kershaw still faces the same division competition that Kennedy does. Is the pressure of facing the Giants different for Kershaw than Kennedy

I don't know how you can justifiably separate the two in that respect, since it seems that SF cannot hit regardless of who's pitching.
Halladay benefits from that rotation he's in. He's still a monster. I just don't know if the NL East is giving him much competition.
I don't see how this makes sense. Halladay would pitch differently if he was, for example, stuck in the Astros rotation? The East still has better offenses than the West does. The Nats, Marlins, and Braves outslug the Padres, Dodgers, and Giants easy.
Kershaw and Kennedy do have the Wins on their side. Gotta love that.
Wins are good as a team statistic, I just don't buy into them as much in terms of fully representing an individual accomplishment. Felix Hernandez won the Cy Young last year because when you eliminate wins and losses, he was the best pitcher in his league last season. Now, factor in that the Mariners had the worst offense in the entire game, while the Yankees had one of the best, which benefitted CC. Does that mean that wins mean more due to run support, which pitchers don't have control over in the slightest? Especially in the AL, when pitchers don't even get an opportunity to hit and contribute to scoring. They are at even a bigger disadvantage because no matter how good they may be, you can be in a situation where giving up 1 or 2 runs might be the difference between an individual win or loss. My two cents anyway.
But most pitchers aren't good hitters so they usually are wasted outs (unless you're Dan Hudson, hit hitting numbers are awfully good). Still, Kennedy has pitched well in games because his very good offense has provided him the adequate run support in which to hold a lead with. Kershaw has a crap offense, therefore he has to be economical with his pitches possibly, knowing he may have little run support to work with.