[PhantomGremlin]

This treatment is VERY unfair to any children this guy fathers.

In order to have the disease you need to inherit bad genes from both parents.[1] Consequently there are many more carriers than people who actually have the trait. So any of this guy's children have at most a 50% chance of having the trait if the other parent of the child doesn't have it, and 0% chance if the other parent isn't a carrier.

I'm sure if we sequenced your DNA we would find a number of potentially very problematic diseases for which you are a carrier. That applies to everyone, nobody has perfect DNA.

in order to not destroy the gene pool

There are a lot of morons in this world; many more being born every day. Many of them manage to reproduce before reaching the point where they would be under consideration for a Darwin Award. In the greater scheme of things this one particular genetic defect isn't seriously threatening to "destroy the gene pool".

[1] https://en.wikipedia.org/wiki/Sickle-cell_disease