States are governments. States are collectives. So being for "states rights" doesn't necessarily mean being for individual rights.
True, but leftists generally support the collective, or the hive, or the union, to the detriment of all else. They falsely believe they are doing good for individuals, but they are only repressing the many to enrich the few...i.e. slavery on steroids.
Your point is a good one, however federalism (real federalism, not what we have) with states rights allows people to vote with their feet.