In this case, if you read what they are doing, they are trying to correct a genetic defect that causes sickle cell anemia. It involves a months-long process of infusing corrected cells into the patient in order to correct a condition that leads to debilitating pain and death for many. Those with sickle-cell often have to endure lifelong blood transfusions if they receive any treatment at all.
There are obvious ethical implications of gene editing and we ought to reject "designer children", etc, but I fail to see how something that can be used ethically to save a person's life and involves ameliorating effects of the Fall is, in itself, wrong.
I suffer from Stargardt's disease and have a genetic anomaly that essentially causes the rods in my macula to die out so I have no central vision. There are experimental treatments for similar diseases of the retina that use viruses to transport revised genetic code to the eyes to (in some cases) reverse blindness.
I, for one, am grateful for advances like this. My daughter would have surely died at childbirth without the aid of heroic intervention by a NICU - technology not available until recent times. My son is a Type-1 diabetic and I would have mourned his death long ago in a different age. My wife has MS and lost vision in one eye for a time. Her MS is being kept under control by treatments that are relatively recent.
We do not need to trust "science" first and foremost, but I do think God for advances that save and preserve life.