there’s a few things you missed. first the obvious, the oldest record of mark ended before this grand tale (about verse 9)
some other important points of conflict between the stories:
- who moved the stone?
Matthew: “There was a violent earthquake and the lord came down and moved the stone”
Mark: “the stone was rolled away, when the women looked up.”
Luke: “The found the stone rolled away from the tomb”
John: “The women went to visit the tomb (which was customary of jews at the time) and found it rolled away, (the story doesn’t tell us whether they looked inside at this point)”
- who sees the risen christ first?
Matthew: “suddenly jesus met them (where?) They clasped his feet and worshipped (which jesus shuns the women for doing in other versions)” (this happens almost immediately after seeing the open tomb and indeed happens - AT the tomb.)
Mark: “When Jesus rose early on the first day of the week, he appeared first to Mary Magdalene, out of whom he had driven seven demons.” (mary was demon possesed in this later mark addition, probably to make the story more fantastic, this also takes place at some undisclosed location away from the tomb and with mary alone.)
Luke: “Now that same day two of them were going to a village called Emmaus, about seven miles[a] from Jerusalem. 14They* were talking with each other about everything that had happened. 15As they talked and discussed these things with each other, Jesus himself came up and walked along with them; 16but they were kept from recognizing him.”
- we’re never told who “they” are in this prose. They also don’t recognize christ, and have a lengthy conversation with him.
John: "They asked her, “Woman, why are you crying?”
“They have taken my Lord away,” she said, “and I don’t know where they have put him.” 14At this, she turned around and saw Jesus standing there, but she did not realize that it was Jesus. "
here again Jesus appears to Mary Magdelene alone, this time without demon possesion and Mary doesn’t recognize jesus. Later in after a dialogue, Jesus tells Mary not to touch him as he hasn’t yet been to heaven.
The fact of the matter is, of the four gospels, none of them agree on crucial points of the crucifixion, resurrection or ascension.
Why is that a big deal? Well either 1 of them is right or none of them are right and it’s a fictional tale. Does that make it “useless”? only if you need it to be true.