I be hearing arguments about reiatsu nullifying hax abilities from the soi fon vs aizen ordeal yet fans seem to forget that that wasn't the real aizen they were fighting to begin with. People also like to use the kenpachi example but that clearly doesn't work because Zaraki isn't nullifying anything he is just using his the force of his reiatsu and pushing Ichigo's back since it wasn't sharp enough this injuring his own hand in the process. Everybody else can cut kenpachi just fine because they have better control over their spirit energy.