It does indicate a protract pattern of behaviuor on the part of TPTB.Because the absence of evidence is evidence in itelf, right?
But that was more of a old friends kiss, not a sexual/romantic kiss.Like that Jadzia Dax/ Lenara Kahn thing. Nobody even mentioned the fact that they're both women.
Women of course do kiss in our culture.
Athough now that I think about it, apparently not in the 24th century. other than the kiss mention, when did any other women even cheek kiss?
What I got fronm the episode is that the J'naii do have genders, both male and female, what happen is their society desided to do away with traditional gender roles. They were still men and (in the case of Riker's girlfriend) women. They were culturally forbiddion to psychologically key in to a gender identity, but again they did have physical genders.The Outcast.
The J'naii are an androgynous species that view the expression of any sort of male or female gender, and especially sexual liaisons, as a sexual perversion. According to their official doctrine, the J'naii had evolved beyond gender and thus view the idea of male/female sexuality as primitive.