From my limited understanding genetic issues are caused by something going wrong, so a scientist can tell you exactly what went wrong and what are the side effects. For example maybe at point X you should have some gene ABC but you had bad luck and you have ABBC and this will cause issues.

So IMO if your child has such an real defect that is 100% scientifically proven that is not normal but an accident that happens very rare then as a parent you should have the right to decide to fix it or decide to let the child to live with it and maybe cure it later if possible.

I do not think we know if Bashir had such a defect in the DNA or he just inherited some "bad" traits from both parents and he did not get a cure but enhancements.

I loved it. I do not understand the joke about Spock "outburst", was there something in that body language that I am missing? And was this a joke inspired by Lower Decks ?