True, but God is pleased to answer the prayers of a righteous man. Being in heaven, we'd presume they are righteous and God will be more pleased to work His graces through the intercessions of that saint in heaven.
Regards
By all means, but that doesn't change the fact that men, whether righteous or unrighteous, can only ask for His mercy. Surely, they can't demand it.
For we don't know what God knows, and what seems just to us may be unjust in God's eyes. Ours is to simply reiterate our trust that, with God, mercy triumphs over judgment.