"As for the Wicca being pre-Christian"

As an aside, the current (exoteric) Wiccan formulation of 'immanent spirituality' as forged by Gardener et al is (I believe) modern - while the heretical (esoteric) Spirit which animates it - is certainly an ongoing tradition..

Wicca is IMO, very much IMO "a finger pointing to the Moon" as indeed any mystical tradition, or religion is.