Taking this out of context is a mistake. You apparently interpret Exodus 20:4 as a forbiddance of the making of statues for religious purposes. If you were to read a little further in that book, you would find that the Lord later commands the making of statues for religious purposes. In Exodus 25:18 he orders that the Ark of the Covenant be adorned with two statues of cherubim. Later still, Solomon, following the will of the Lord, installs giant statues of cherubim in the sanctuary of the Temple in Jerusalem (1 Kgs. 6:23-35). Clearly, you have missed the point of Exodus 20:4. God isn't saying that we shouldn't make statues. He's saying that we shouldn't worship them or the false gods they may represent. He is forbidding idolatry. He is not forbidding artwork that draws our hearts and minds closer to him.
Nope - idolatry is the sin. That is not what is being discussed here.
It is you who has both made a false comparison and taken it out of context. The Cherubim you speak of was not being "honored" in this context. And Aaron and Israel were not trying to worship false gods. They were trying to worship the God that brought them out of Egypt. That golden calf represented The one true and living God. It is in the context of the Exodus passage idolatry.