While a leitmotif among our “liberal” brethren is one or more versions of “Jesus attacked the Pharisees for doing exactly what you seem to be advocating” - i.e., recognizing that there are divine laws and that those who love God will keep them (John 14:23), an analysis of the conflicts between Jesus and the Pharisees dispels that notion.

If anything Jesus made the laws more demanding. It was the focus that changed.