But it is not. It is about values, which is more deep than "light conversation, fun and general connection". Think pro-choice vs pro-life, SAHM vs working women, equal partnership vs women submiting to husband... All those things affect a relationship in very important aspects and there is a correlation between political stance and those values.

The reason that you think it is "superficial" is because what you were used to see is women not being vocal about their values and compromising all the time. That is, giving up on their values in order to avoid conflict at the marriage. That is what has changed,now women are chosing men with similar goals in the partnership. Just that.