The Law is based upon love and God is Love.
Therefore the Law is based upon God! It is part of His personality. The problem is not the Law or it being correct, but ihow we interpret it.
Was it against the Law to heal on the Sabbeth?
NO IT WASN'T!!
Jesus asked if it was unlawful to do good on the Sabbeth! Of course it was not unlawful to do good because the Law is based upon love. What failed was the people's ability to correctly interprete the Law, and that is because the Scriptures, including the Law, is not correctly interpreted by our understanding but by God's!!
Not all the commandment are equal. There are greater commandments in the law. When two commandments, come into conflict, like if not working on the Sabbeth and the command to love your neighbor, the command to love your neighbor takes priority.
It is really not that hard to understand. Jesus pointed out that if any of them had an ox that had fallen in a ditch they would have pulled it out. So how come they didn't understand that if was ok to heal on the Sabeth?
Did they love their neighbor as themselves. What if they had fallen in a ditch, would they have worked to get themselves out of the ditch? If they were starving would they eat to save themselves, even if all they had was food dedicated to God. And if they were hurt would they do what they could tl help themselves even on the Sabeth? So if they would have done all that to for themselves how then did they think it wasn't lawful to do that for others on the Sabeth.
The Lord made the Sabeth so that we would take some time from our work to rest and spend some time in fellowship with Him and others. Relationships are important. That is something that some of us forsake for to make more money. I have that probelm as much as the next guy. So God gave the commandment to take some time off for our sake. It was a loving thing to do, but so is healing and helping. It's not hard to understand unless you are so focused on the Law that you forget the purpose of it.
Still, we don't fulfill the Law by leaning on our understanding of it, but rather by listening to and following the One by whose understanding it was handed down.