I personally have always assumed that the gender-choice was an 'incidental' of the incarnation, and not one of any specific revelatory import. When I began thinking of OTHER incidentals:
The list could go on--with each detail being examined for its 'incidental' character. I DO think there is some significance to the fact that He came as a human (as opposed to animal), and that He came in a sinless character (as opposed to a sinful character.) There MAY BE some significance that he was born of a female-only (instead of miraculously created WITHOUT a mother--the lineage problem would have been solved by the 'legal' Joseph anyway), but I don't have enough confidence in this argument.
Where this nets out is that "Choosing" in regards to the Incarnation does NOT seem to be related to "Valuation" at all. To argue that it WAS positively correlated would require a supporting argument--which I have not seen so far.