Wat's your point? That we can't pray for someone? Is not praying for someone an intercession on behalf of someone? Is someone asking us to pray for them not a supplication for our intercession?
I don't know about the Protestants, but the Apostolic Church has believed and believes that Christ gave us life, He unshackled us from death, that those who are in heaven are alive and that they fervently and unceasingly pray for our souls.
Where is the wrong in asking the living on earth on in heaven to pray for us?
The point is for us to pray without ceasing.