There are plenty of other instances where our advancements have likely influenced our evolution. For one, the ease at which we can today travel between continents means that there's far more breeding between different races than we've ever had in human history. Should that be stopped? We also don't run/walk nearly as much as we used to thanks to harnessing hydrocarbons...should we continue to try to select for the long-distance running abilities that helped our ancestors kill animals for food during persistence hunting? And I'm betting that certain people are genetically more predisposed to catching measles, polio or any of the other diseases for which we've developed effective vaccines...would we want to make sure that those genes don't get passed on?

In short...why optimize for a world that doesn't exist? Unless you subscribe to a belief in a post-apocalyptic future where modern technology regresses and mankind is forced to live in a more primitive state, there's really no need for us to actively do anything...the magic of evolution is that it just happens naturally. Now, evolution can be an uncaring bitch to individuals, so there's plenty of reason why an individual would want to screen their offspring for certain genetic traits, but at the societal level, it's just swimming against a really strong current.