The idea of individual locus of control is how western society has made so much progress. The idea of determinism that a certain subset of the "political left" has embraced is detrimental to the functioning of society, no matter how true it actually is. When people are not invested in their outcomes through a society-wide belief in individual control, we end up with situations like collective farming. Taken to its extreme, the idea of determinism results in "from each according to his abilities, to each according to his needs", equal outcomes for disparate effort and ability.