Generally speaking, the smritikars never care to explain the why and the how of their dogmas.
“I never made a mistake in my life; at least, never one that I couldn't explain away afterwards.”
Never apologize and never explain, it’s a sign of weakness
To explain all nature is too difficult a task for any one man or even for any one age.
Never complain, never explain.
Never complain and never explain.
If you can't explain it simply, you don't understand it well enough.