We're currently in the middle of several highly emotional political debates, which would easily be resolved by having better/more scientific data, particularly into the correlation of IQ and interests with race & sex. Sure, genetics don't determine an individual's life, but they do influence population averages, so if genetics explain/predict sex & race differences in careers and education, we could hopefully resolve those debates.
Another example of this is the association between violence and (1) computer games, and (2) sex/testosterone. The first one, albeit "intuitive", was debunked using science/statistics, and the second one most people just assume as "obviously" true (and noone claims sexism!) (although AFAIK it's scientifically debatable).
Again, genetics don't determine an individual, but they do influence the population & sub-groups.