If gene editing can make a human smarter & better looking, then you're dooming your own children to a lifetime of inferiority if you have them naturally. Unlike tech or drug enhanced people, there is no way to detect a genetically enhanced person. So they'd be in your midst, better than you in every way, while you'd be stuck with the realization that there is nothing you can do in this life to change your inferiority to these neo-humans.
"Those who make peaceful revolution impossible will make violent revolution inevitable" - 1962, John F. Kennedy
Pandora's box is already unlocked, we just won't let anyone open it. At the same time, technology is inevitable, and it's probably better to set up legal pathways to access this technology than let the grey market go wild.