Just asking: where in the Missal or elsewhere is the priest directed to say Mass facing the people?
What document of the Church makes it normative?
The earliest CDW document I can find is from 2000, which simply suggests it as an option, 'to facilitate communication', but by then practically every priest in the Latin Rite was doing it, and zillions were spent to facilitate it, but who said do it and where?
The Missal clearly implies the priest faces the 'apse', and says when the priest faces the people.
Cardinal Nichols assumes it to be normative but gives no reference for such an assumption.
Even the Tridentine Missal allowed for those peculiarities, mainly Roman Papal altars, where the altar is built over a Confessio of a martyr so it was impossible to stand in front of the altar -with the people- but this was an exception. Indeed in the Michaelangelo re-ordering of St Peter's the people that mattered, the Papal Court, knelt behind the Pope between the Altar of the Chair and the High Altar.