Great article, thank you for sharing your opinion on this important topic. The question of where to draw the line between sick and healthy is as old as medicine itself. Pure orientation to the statistical norm is problematic. As you describe it with deafness, we should not be rash about judging what is good or bad. After all, every person has his own subjectivity, which is difficult to judge from the outside. Biologically it is also wrong to speak of a “good” or a “bad” trait. In the course of evolution, mutations have always been a "good thing" to make living organisms more varied and better adapted to their environment.
Of course, the genetic engineering methods are a blessing when it comes to relieving personal suffering, but we must not become uncritical of these methods.
And most importantly, we must do everything we can to ensure that the moral and ethical discussion keeps pace with scientific progress.