Humans share our values and can generally be overwhelmed with sheer numbers should they not. Making them is unlikely to be dangerous. The same cannot be said for unfriendly AIs. We still have no idea how to make a friendly AI, and it could easily be a century before we begin to have an idea. Even if biology cannot keep up, improving intelligence in the short run will have positive effects on human productivity in the short run, which will get the goal of making a friendly AI closer.

I'm not saying that biological modification will ultimately bring about singularity or even extremely dramatic changes in human capabilities. Rather I think it will address many talent shortages simultaneously, for not that much money. I'm proposing it as an idea we can implement now.