God didn’t act out all the commandments, did he?
If you read the Bible carefully, you will notice that God and Christ never did the same thing twice in the same way. There is always a different method. He is not limited to any particular method that you (or I) may be partial to.
He demonstrated our work week, so that when He dictated the Ten Commandments, He pointed back to that demonstration as an example--Exodus 20:8-11.