"This commandment strikes against a desire, or should we say a disease, which is deeply rooted in the human heart, namely, to bring in some aids to the worship of God, beyond those which He has appointed—material aids, things which can be perceived by the senses."
The desire to visualize the physical appearance of the LORD Jesus is strong within the human heart. To accommodate this desire, skilled artists have painted pics that many would assume could look like Jesus, or at the least represent him.
We had a brother, Sam, now deceased, in our church who saw Jesus - he was given a vision and saw Him. After this episode, he had his wife destroy all pictures in the house 'of Jesus'. He said Jesus does not look any think at all like those pictures they had.
Back to the OP, have you ever noticed that failure to obey the first commandment will result in spiritual failures all around? One cannot observe the first and then pick and choose the rest of the nine and still be faithful to the first.
Yes, the ten commandments are a summary of what God expects of his creation...these concepts were in force from the creation, they were not new ideas when God gave them to Moses on Mt. Sinai.
Blessings.