Gavra, You know what Deuteronomy says. See Deut 28. It says anyone who does not obey any particular law will be Cursed. That is a fact. It will effect your life and your well being. But the halacha that is continuing to evolve may or may not be exactly the Laws of our Torah that we adhere to. So if someone say refuses to wear tzitzis in public, that is a curse on his life.
My life is better today becuase I obey the laws of Moses.