CRISPR used to remove extra chromosomes in Down syndrome and restore cell function

Or enforce social hierarchies based on genetic traits? (Gattaca)

As I recall, the reason the Federation outlawed genetic manipulation is due to what happened with the Eugenics Wars, the details of which are murky due to temporal interference, but one of the root causes was clear. While the end results of genetic engineering (Khan Noonien-Singh and his Augments) were undoubtedly superior to normal humans in every way, they also incredibly aggressive and arrogant, a flaw their creators could not correct, as the science was still in its infancy. One of the scientists remarked that "Superior ability breeds superior ambition".

checks correlation of education to voting outcomes

Checks news

It will be seen as an anti-control danger and banned entirely by the nearly single-circle Venn diagram of government officials, oligarchs, and religious figures.

They will be quiet about the true nature of their decision. Instead, it will be called a danger to society, ungodly, and unnatural. Rumors will be started that it creates autistic psychopaths, and that anyone in any country that touches the technology will need to be permanently ostracized.

I believe this will happen, only slowly enough that it will feel normal. First genetic diseases for a generation. As our understanding and editing improve, humans will start to edit for benefits, maybe something small like eyesight, so kids don't need glasses. Eventually, it will just be a part of our medical culture. If everyone is edited, it won't be taboo to keep going, after all, who wouldn't want their kids to be better off than they are? 1000 years from now, our species won't be recognizable to us today. Slightly related, have you seen what they're doing with lab grown human brain cell organoids connected to microchips? 1000 years (or significantly less!), unrecognizable.

Black Mirror episode