The point is that all 3 of the other Gospels confirm that the women at the tomb EVENTUALLY, if fearfully, shared their experience at the tomb, a testimony that would hardly be invented, considering female testimony lacked credibility in that world. Nor would they continue to feel the need for silence once the male disciples began to see the risen Jesus. And John's empyy tomb tradition is considered more original than Mark's because on the first 2 visits to the tomb in John, no one sees angels or the risen Jesus. See Cambridge scholar C. H. Dodd, "History and Tradition in the Fourth Gospel."