To put it another way: These "laws" describe what we think is going on based upon human observations and testing.

The scientific method is our tool for figuring this stuff out, and "laws" are subject to change when we figure out or discover something we didn't know before.

Just because something is a scientific law does not mean that it's 100% correct and immutable for all time: It's just our concept of what seems to be happening based on what we observe and what we think we know.