The historicist argument in support of following the qere over the ketiv is that the ketiv simply makes no sense in context. There was simply no contemporary Biblical world view in which people believed that they created themselves. It is bolstered by a constructionist argument that the structure of the psalm is better taking the qere reading, as in that way each part of the second half of the verse contains a pronoun or possessive suffix referencing the names of God in the first half.