While I wouldn't entirely disagree with you, I think the analogy needs a little tweaking.

To my mind, it's not that the act of a girl looking for a rich guy and a guy looking for an attractive girl are the same act so much as it is that more times than not these two will find each other.

Girls whose priorities are in wealth and financial security with not end up attracting guys who are interested in relationships based off of emotional commonalities (read similar likes and values). Likewise, guys whose priorities are in finding the most attractive girl will not end up attracting girls who are interested in relationships based off of emotional commonalities.

This is essentially consistent with your analogy. The problem is that just because this is true is no reason to accept it as a healthy basis for a relationship.