But now the question gets interesting. If the microscopic world is truly random, why is our macroscopic world more predictable? Maybe someday we will find the exact reason!

The laws of physics for the macroscopic world stems from those of the microscopic world once a given limit is taken. The word limit makes all the difference. All quantum effects have a strength negligible at the macroscopic level.

A good example is statistical physics where macroscopic properties are derived starting from microscopic quantities.