Nature has selected for human populations inclusive of females which consistently favour the best seed and resources, thus hypergamous females, yes. Though this is not all. For example, even after mate selection, while in relationship, the female's discontent ensures the males continuing efforts. So you could say selection pressures don't cease at any stage.

Though to apportion blame for this aspect of female nature is to miss the point. In the absence of self-awareness, behaviour remains directed by a set of instinctual drives which have served our survival and thus remain dominant traits.

To become aware of human nature is rather to recognise the inherent challenge for all involved, and thus encourages love and empathy as a foundation of understanding.