No segmentation—clicks are treated as a commodity. Not all clicks are created equal. Ad response traffic often contains a spectrum of different audience segments. They clicked on the same ad, yes, but not all for the same reason, not all with the same needs.
The one-page format of landing pages makes the same pitch to all of them, oblivious to their distinctions. If the page focuses only on one segment, it disenfranchises others; if it tries to speak to all segments at once, its passion and relevance to any one segment are watered down.
A better approach is to use a landing path where the first page induces a one-click directed behavioral segmentation choice from respondents—a branch in the path depending on the segment the respondent selects—and then you can speak with conviction and authority to each segment's specific interests on page two.