Are you saying that Mary has some kind of power to see into the future and keep things from happening?
If that was the case, why didn't she keep him from getting shot in the first place?
Why didn't Jesus simply keep Lazarus from dying, especially since He had advance notice of his impending death? Why didn't He keep the son of the Widow of Nain from dying? Why didn't God keep the boy from falling out the window during St. Paul's preaching in Acts 20:09? Could it be that John Paul II was allowed to be shot for the same reason given in Lazarus' case (and presumed in the others cited): "It is for the glory of God, so that the Son of God may be glorified by means of it" (John 11:4)?
The intercession that John Paul attributed to Mary gave glory to God, if it happened, since Mary (or any other being, saint or angel) is tasked to intervene by God's consent, through His power, and for His glory.
That you and others refuse to see this seems willfull, given that, provided an example occurs in the New Testament, you accept similar scenarios without questioning, and without cautic comments about preserving the subject (John Paul in this case) from death or injury to begin with. The irony is rather glaring.
Notice that this is one sentence that contains two questions. The first question is: "Are you saying that Mary has some kind of power to see into the future?" The answer to that question is: no, I'm not saying that. Your second question is: "[Are you saying that Mary has some kind of power to] keep things from happening?" The answer to that question is: yes, she has the power to intercede through prayer. You have that power too, but she is "full of grace", and therefore, since the "prayer of a righteous man availeth much", her intercession availeth much.
-A8
I'll address your odd questions if you have the wisdom and courage to answer the following things about Baptist beliefs: