It's a toss-up whether this reasoning is any worse than the 'immaculate conception' origin for Anakin that GL gave us. I'm torn...
But seriously, if I recall correctly, adywan is planning on not having Anakin build his mum a 'protocol' droid to begin with, for his eventual TPM:Revisited, which helps. And I'm kinda hoping that he'll simply omit that part of the Qui-Gon/Shmi conversation, when the time comes.