How ancient builders made the Great Pyramid of Giza nearly earthquake-proof

In other words, huge massive structures are naturally earthquake resistant --- in the same way mountains are.

Why don't we build structures like this today?

They are very expensive and not very practical. They are monuments designed for visual effect and not much else.

Chills giving to think about this like even in 2026 with Ai we are not able to build anything like that which has 100% accuracy of success rate

TLDR but I'm guessing massive, massive stone blocks