if you look at the reborn skill list, no class get to keep ALL their skills from their previous class when you reborn into a new class. It was never meant to be that way, and they never said that it would, so I dont see whats so contradictory about it. sorry.
Just remember what ol' Jack Burton does when the earth quakes, the poison arrows fall from the sky, and the pillars of Heaven shake. Yeah, Jack Burton just looks that big old storm right in the eye and says, "Give me your best shot. I can take it."