As noted, there was no control group and it was only a two year study so they don't give the subjects much time for the consequences of their operation to sink in.
Also, apropos of nothing, the director of the NIH sub-org who funded the study happens to specialize in sequencing and manipulating fetus DNA in vitro.
Study:
https://www.nejm.org/doi/full/10.1056/NEJMoa2206297
As noted, there was no control group and it was only a two year study so they don't give the subjects much time for the consequences of their operation to sink in.
Also, apropos of nothing, the director of the NIH sub-org who funded the study happens to specialize in sequencing and manipulating fetus DNA in vitro.