Would you subject your child to a 1 in 1000 chance of being brutally disfigured? Well genetic defects that cause much the same thing are more common than that.
The use of genetic measures over measures of the phenotype in that movie was silly. Cognitive genomics will never be as accurate as an IQ test. It would be a mistake to, for example, replace the SAT with a spit swab, even in a society with genetic engineering.
And for the record GATTACA is the story of a misguided insufferable asshole violating regulations and probably getting his entire team killed 5 minutes after the movie ends due to his heart condition.
That's a bizarre statement in the modern world. In the modern world, we vote on whose opinion carries the day, and that is only in the unusual cases where government has power in the matter (because we have freedom and civil rights).
I very much want to experiment with cooperatives, and things like https://pol.is/home