Why is it stupid or reckless? In fact, this is a good way to mitigate risk. Most genes in mosaicism, even if parts of the mosaic is faulty, continue to functio

Why is it stupid or reckless? In fact, this is a good way to mitigate risk. Most genes in mosaicism, even if parts of the mosaic is faulty, continue to function or partially function. Would you rather risk complete failure? (Potentially killing the fetus or embryo.) Also, someone has to take those (potentially reduced) risks if germ line modifications are needed.