"The benign explanation is that the testimony proceeded from vellity. She wanted it to be the case that she had paid for all the renovation work. Over 20 years, subconsciously, she convinced herself that it was the case. So dearly cherished an outcome became inexpugnably part of her mentality.’"
I think there is a great deal of that in relation to her record as PM. Subconsciously Labor supporters are attempting to convince themselves that Gillard wasn't incredibly incompetent as PM and they want to believe it so much that eventually they will think it is true.