The "Mohorovičić discontinuity drilling project" had in fact been the first scientific drilling project. Launched in the late 1950s, its main purpose had been to drill through the Mohorovičić discontinuity, uncover the secrets of the mantle, and achieve a major breakthrough in geoscientific research.
Drilling projects on Earth faced many problems. First, Earth's core had not "died"; crustal activity remained frequent. Combined with the vast oceans covering its surface, drilling underground first required overcoming the challenges of underwater operations.
The Moho Project had chosen a site off the coast of La Jolla. It ultimately drilled 315 meters into the seabed beneath waters 948 meters deep, but the project was abandoned midway due to technical difficulties and enormous costs.
On Mars, engineering work was much simpler. There was no ocean covering the surface; they only needed to find a relatively low-lying area and select a suitable site to begin constructing the Moho drill.
Moreover, Mars was smaller and less dense than Earth, making drilling less difficult. There was also no need to worry too much about possible crustal movements affecting the borehole.
There were several advantages:
Although vastly different from Earth, it was still a planet, and humanity had never obtained geological samples from such depths before.
Furthermore, since it had now been confirmed that Mars possessed water buried deep underground in the form of ice, that meant there were likely large quantities of Minerals beneath its surface. Resources would never be scarce, and one more extraction method meant one more option.
Finally, drilling into Earth's mantle would theoretically not cause any catastrophic damage to the planet with current technology. But the crust was a complex system. Even if it could not destroy Earth, triggering a major earthquake or tsunami might be little more than a shudder to the planet, but