Genetically altering IQ is more or less about flipping a sufficient number of IQ-decreasing variants to their IQ-increasing counterparts. This sounds overly simplified, but it’s surprisingly accurate; most of the variance in the genome is linear in nature, by which I mean the effect of a gene doesn’t usually depend on which other genes are present

Contradicted by previous text in the same article (diabetes), not to mention have you even opened a college-level genetics text in the last decade?

Anyway, I would encourage these people to flip their own genome a lot, except that they probably won't take the minimum necessary precautions of doing so under observation in isolation. "Science is whatever people in white coats say it is, and I bought a nice white coat off Amazon!"