I understand your thought process, but don't agree.
Even Paul instructed people to follow the Law, not because it could save them, but it is God's instructions for life.
If you moved to another country, and they had different laws, those you would observe. Now, being a Christian, I follow God's laws as it is the "land" I have chosen to reside in.
Be careful. I wouldn't bet my salvation on my understanding of anything. Not because I presently believe I am wrong, but because God's ways are unknowable, and being wrong on just one point could be devastating.