What is preventing one of the genetic sequencing services from making the connections? There must be enough commercial databases available to allow them to "add

What is preventing one of the genetic sequencing services from making the connections? There must be enough commercial databases available to allow them to "add data about health, education, occupation, and income". Sooner or later, the data will be available. Where will it end? Will "stupid" people stop having children or will they choose intelligent donors until genetic engineering is possible?