> But, if we are serious about the problem, we need to be honest about the large genetic basis of adult intelligence and then figure out how to humanely encourage eugenic reproductive patterns

If the problem you are concerned about is "people with a low adult IQ exist" rather than "people are unfairly obstructed by social conditions from realizing their potential", yes, eugenics would seem to be an important part of the solution.

But for many people, the problem is not which people exist, but the degree to which we harm the potential of certain of the people who do exist.