Only Jesus can bring us to God.
Mary was a mortal woman and she is now a dead mortal with even less power.
When the course of her life on earth was completed, Mary was taken, body and soul, into heaven.
It is an interesting fact that no one in the history of the world has ever claimed to possess a relic from the body of Mary. The complete absence of such a claim is conclusive evidence that even those inclined to make fraudulent claims of that sort have known from the beginning of Christianity that no one would give such a claim any credence.
In other words, belief in the bodily Assumption of Mary into heaven dates all the way back to the Apostles.
Put another way, we can be certain that, if Mary had died and been buried, there would have been both genuine and fraudulent claims regarding relics. There have been no such claims. Therefore, she was bodily assumed into heaven.