What prevents geologists from exploring the earth's interior?

Geologists face significant challenges in exploring the Earth's interior due to extreme temperatures and pressures that make direct access impossible. The deepest mines and boreholes reach only a fraction of the Earth's crust, while the mantle and core remain largely inaccessible. Additionally, the complexity of geological processes and the vast distances involved hinder our ability to gather direct samples. Instead, geologists rely on indirect methods such as seismic wave analysis and computer modeling to infer the properties of the Earth's interior.