Yes the subjectivity of valuation reveals a deeper objectivity, this is how we connect into reality. More reality = more political power, but it also equals more power to construct subjectivities, "non objectivity", like opinion, sentiment, etc. It is possible that all human "opinion, sentiment", everything "subjective" is simply something created as a side-effect of true objectivities as politics power in the high culture of a civilization.
But it requires something... unknown, to link self-valuings in this way, under the surfaces of shared value-worlds. We can simply call it logical necessity, but I imagine it is far more "real" than that too. Think archetypes, global consciousness project, ...