there in lies the difference between us -
Christians believe if you die “ in Christ” your soul is in heaven with the Lord. God is not the God of the dead but the living.
It’s a long way and against scripture to make up the practice of praying to saints in heaven from “God is the God of the living”. There is a distinct difference in scripture of living on earth and “living” in heaven. No examples or reference is given in scripture of intercessors who have died and gone to heaven. In fact, specific instruction is given to pray to God only and that Jesus is our only intercessor.