Right. That means it's a divine revelation and clearly mentioned it will be protected from corruption and mischievous error.
Of course it's good as it comes from the creator, as many will change their laws to their whims and fancies.
As human nature doesn't change so does laws that govern human behaviour.
Did the past 2000 years of technological progress changed human behaviour?
Is there a reduction in greed? Wars? Selfishness? Poverty?
No!
The medieval behavior of muslims does not changed even they are living in the modern age. Muslims are still practicing stoning and public whipping. The recent culture is beheading.