Is that because you don’t believe in mediators?
Nope. But Jesus didnt instruct us that we ask anyone to mediate for us, He clearly explained that we as sons of God can pray directly to God, and then He gave us His example and began the Our Father,....
I pray directly to God. As Jesus instructed and demonstrated.
He never ever told anyone ask my mom to pray for you because my grace comes back to you through her.