tuning needs a listener who stays, plays the note, hears, and adjusts it. the one who edits an embryo is gone before the music plays. the decision is made by actors inside a single note, deciding a piece they'll never hear. the other side puts the line at carelessness without consent or oversight. descendants cannot consent. oversight needs sight and recall, with an inherited edit offers neither. huntingtons is not a single note. the same repeat expansion that causes the disease comes with a bigger brain and higher IQ scores early in life, and the effect peaks near 40 repeats before it declines. the tuner sees a disease allele and misses the instrument.