The wiki article is false and so is the so-called scholarly consensus. The Old Law is historical divine revelation given by God to Moses for the Israelites. The ancient Israelites monotheistic religion and faith in the one true God is incomprehensible without the historical Moses. Jesus himself spoke of Moses a number of times and as at least one poster mentioned, he was in the transfiguration with Jesus and the prophet Elijah. The twelve apostles and St Paul upon which Jesus founded his Church all believed in a historical Moses, so again, there is no indication whatsoever that in their three years of being with Jesus before his death, that Jesus intimated to them in any way that Moses was not an actual historical person. And this faith the Apostles handed down to the first christians, apostolic fathers, early church fathers and down to us.
All the early Church fathers believed in a historical Moses if one reads their writings and all the doctors, saints, and entire catholic faithful that followed in essentially the entire Tradition of the Church. Jesus and the apostles were jews or hebrews with the religion of the Old Testament or what is called Judaism and it is incomprehensible without the historical Moses. The divine revelation of the Old Law to Moses is an historical fact, for divine revelation means just that, i.e, God’s supernatural intervention or communication of himself in words or deeds to historical mankind.
The inspired sacred writings of the Old Testament are an historical record of principally, but not without other historical facts either before or alongside the Israelites such as other nations, God’s chosen people beginning with the call of Abraham, our father in the faith and the father of the Israelite nation from whom Christ was born. The theology of the sacred writers of the Old Testament cannot be comprehensibly understood apart from historical divine revelation for they are intimately and inseparably connected. In fact, many of the books of the Old Testament were written by either Moses or later prophets themselves who were the recipients of God’s supernatural communication or divine revelation.