A somatic cell intervention is morally justified…

It is morally acceptable to offer somatic interventions to those person who acquire it in each generation it appears, then it is also morally acceptable to alter the germ-line so that this condition is not passed on to future generations. This would also have the added benefit of being more efficient in terms of time, money and resources then somatically altering the genes of each sufferer on an ongoing generational basis. To use the example of Huntington’s again, if we find it morally acceptable to correct instances of the disease in people through somatic cell therapy, performed on each generation, then it is also morally acceptable and would be more efficient to correct the condition through germ-line interventions to ensure the condition is not passed on and the becomes more and more rare, requiring less interventions per generational group.