No, it's not anything you're missing, just your conclusion from the data given. In my opinion, if we're talking about value here, the negatives listed in that blog entry just don't stack up against the value add YC brings (e.g., as mentioned, connections, exposure, advice...).
That's not to say that YC is right for you. There are plenty of potential reasons that YC is not a good fit and obviously plenty of ways to succeed without them. Some of the negative points you bring up have a lot of bearing on your lives as founders and probably should be considered. I'm just skeptical that, were you accepted into the Summer Founders Program tomorrow, it would be a sound business decision to turn YC down. Then again, maybe there is something you know that I don't...
That's not to say that YC is right for you. There are plenty of potential reasons that YC is not a good fit and obviously plenty of ways to succeed without them. Some of the negative points you bring up have a lot of bearing on your lives as founders and probably should be considered. I'm just skeptical that, were you accepted into the Summer Founders Program tomorrow, it would be a sound business decision to turn YC down. Then again, maybe there is something you know that I don't...