Suitable locations for pumped hydro are very limited, it is a comparably rare resource.

A lot of mountainous places are dry, and a lot of wet places are flat.

Of the remaining places, some are so unique that they cannot be destroyed by industrial construction (National Parks etc.)

For example, the main ridge of Krkonoše (Riesengebirge) on the Polish-Czech border has a lot of wind and rain and deep valleys, but it is the only place south of Scandinavia with a Scandinavia-like tundra and many endemites surviving from the last Ice Age. Any attempt to construct pumped hydro there would result in a national uproar on both sides of the border.

Pumped hydro just requires a lake at the bottom of a slope. Unlike hydro generation, it doesn't require flow. Here's almost a million locations suitable for pumped hydro: https://re100.eng.anu.edu.au/global/

Suitable locations for on river pumped hydro are limited.

But off river? The possibilities are vast.