An interpretation of the scene that addresses all of Zernin and Gunbatte'a concerns might be that the female frost giant perceived sexism when none actually existed. Not all occssions where a person claims sexism result from actual sexism and we have seen no evidence of sexism amongst frost giant society (other than this one giant's perception) in the strip so far. Indeed (as some have pointed out) males and females seem integrated (for example the most prestigious group - the casters - includes two males and two females).