This is one of the most important questions in Chinese metaphysics. Several factors explain this:
1. Environment matters. Two seeds from the same tree, planted in different soil, grow differently. Your birth country, family, and community shape how your chart's energies express.
2. Gender matters. The same chart reads differently for a man and a woman because the 10 Gods assign different roles (husband vs. wife stars). Your chart's "Big Luck" direction also reverses based on gender.
3. Choices and free will. Your chart is a weather report, not a script. Two people with the same "stormy" cycle can build different shelters.
4. Ancestral and family karma. Chinese metaphysics acknowledges that lineage energy influences how a chart manifests.
Same blueprint, different buildings.