I don't know what you mean by "definitive conclusions". Any conclusions that will be made will naturally be statistical in nature, and obviously the boundaries between groups are fuzzy in many cases. That does not mean that groups do not exist. It's not a coincidence you can pass people by on the street and readily identify 95% of them as being "white", "Asian", "Indian (/Pakistani/etc)", "black", etc, and that if multiple people perform this task, the agreement will be very high. It's obviously shared genetics that are causing these groupings, and if shared genetics are leading to statistically significant identifiable observable characteristics in one area (appearance), it's reasonable to ask if they are leading to other statistically significant differences.
These differences are already used very widely in discussions about policy, as you noted, and that's exactly part of the reason why it should be fair game to fully investigate those differences.
These differences are already used very widely in discussions about policy, as you noted, and that's exactly part of the reason why it should be fair game to fully investigate those differences.