TTR, thinking the same question about proverbs, which often have misogyny but seldom negativity about the male gender, I realized that proverbs spoken by and for Men were much more likely to survive through being written down and/or printed than proverbs spoken by and for women. We may have the same thing going on with trad. songs; there may have been more songs with women's perspectives which simply did not survive because many more of the primary mediators of the culture (folklore collectors, scribes, printers, etc)were male.