Not being Christian might make it hard to muster arguments for it, but things go by scaling factors. I noticed a lot of Christianity is pretty good--mainly the medieval thinkers and mystics. Aquinas, Anselm, St John, Abelard. There was some Scottish fellow also around 800 AD who was a pretty deep thinker. And obviously Boethius and St Augustine. I can not imagine what could be the motivation to jettison all that. The only thing I thing Christianity got wrong was the antinomianism thing of Paul. Also the Trinity seems to be a mistake.