the technology to do that existed before NFTs, and doing it on the blockchain would actually be less functional. cybersurveillance is already widespread, and the only thing preventing it from enmeshing into daily life as deeply as you describe is the incentives aren't quite large enough for enough powerful entities. the appeal of NFTs to the ruling class is not primarily as a means of control, but as a way to temporarily stem the declining rate of profit by creating value out of thin air.