Here's why:

* Formation: Granite forms deep underground when magma cools and solidifies slowly. This slow cooling allows large crystals to form, giving granite its characteristic coarse-grained texture.

* Composition: Granite is rich in quartz and feldspar, making it light-colored and relatively hard.

* Distribution: Granite is found in vast batholiths and other intrusive formations across the globe, often associated with mountain ranges.

While other intrusive rocks like gabbro and diorite are also important, granite's widespread occurrence and abundance make it the most prevalent type.