Here's why:

* Volcanoes are natural phenomena: Volcanoes are powerful forces of nature that operate based on geological processes deep within the Earth.

* Observation and prediction: Geologists can observe and study volcanoes, monitoring their activity and trying to predict eruptions.

* Early warning systems: This data helps create early warning systems to alert people in the vicinity of an impending eruption.

* Mitigation efforts: Geologists also play a role in planning evacuation routes and advising on mitigation efforts to minimize the impact of eruptions.

However, geologists cannot control the volcano itself. They can only study, predict, and warn about its behavior.