Maybe so but there's no indication from Scripture that they can hear us.
Besides,... Romans 8:26&27 In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us with groans that words cannot express. And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for the saints in accordance with God's will.
The Holy Spirit prays for us according to what He knows is best.
What else do we need? Is any saint or even Mary going to be able to pray for us as effectively as God the Holy Spirit Himself?
What kind of YOPIOS is that? Yes, the indwelling Holy Spirit guides our prayers. By your logic we wouldn’t pray at all.