Why are plateaus formed by crustal shortening most common in dry climates?

Plateaus formed by crustal shortening are most common in dry climates because these environments are essential for the survival of the landform's structure.1

In these regions, crustal shortening thickens the crust and creates high mountain ranges surrounding broad valleys. Unlike in humid environments where rivers and streams actively transport eroded material away from the mountains to distant plains, these plateaus rely on internal drainage. In dry climates, erosion is significantly slower, allowing the valleys between the mountains to act as basins that collect and store debris.1

Over time, these basins fill with sediment, creating flat, broad surfaces that define the plateau. Essentially, these landforms are mountain ranges that have been buried in their own debris. If the climate were wetter, more vigorous erosion would likely remove this sediment and prevent the formation or long-term preservation of these flat, elevated surfaces.1