. . . And the fact is, he did not keep the law and every jot & tittle perfectly anyway. I don't need to tell you how often he was criticized for 'breaking the law' by the legalistic Jews of his time. He did something very important for us but it wasn't keeping a bunch of arcane Mosaic laws.
I think you may have missed the point. Jesus kept the Law
. The Pharisees resented him for not keeping their traditions
One particular aspect of the Law should be mentioned here. When the Jews performed ritual sacrifices, they were commanded to offer the best of their possessions:
First born animal with no defects, not crippled, etc.
So when God offered his first born, who had kept the Law perfectly, it fit the type prefigured by God's standards. You may ask why was perfection, the very best, required? The answer lies within the necessity of a complete answer to Satan's allegations.
From the beginning of Satan's rebellion, one of the foremost issues was the integrity of God's intelligent creation. It was highlighted in the case of Job. God allowed Satan to test him in an awful way; but Job endured without sinning against God. Jesus proved to be an even greater example. He was the perfect sacrifice and endured the worst Satan could inflict.
So, his perfect life, his suffering, his blood - all were necessary to provide the quintessential answer to Satan's challenge.