I know I have personally given examples not specifically mentioned in the Bible that are implicit according to tradition. Being pro life vs. abortion; abortion is defined in the Didache but not specifically in the Bible. I mentioned a prayer for a departed person from an account of St. Paul & Thecla which is an accepted historically by the earliest church. I provided verses from Matthew 22:32, 1 Timothy 2:1, & John 5:22-30 which in summation say God is of the living, to pray for all, & all will hear the voice of the Lord at His second coming.
By your reasoning do we question the intent of scripture on abortion? Do we say early post apostolic accounts (held by the church) & understanding scripture in light of prayer are traditions of man? By incorrect authority which pattern you unintentionally ( I stress unintentionally) vear?
Matt 22:32 I am the God of Abraham, the God of Isaac, and the God of Jacob?' He is not the God of the dead, but of the living."
Jesus spoke about the resurrection of the dead...not praying for them.
1 Tim 2:1 First of all, then, I urge that petitions, prayers, intercessions, and thanksgiving be offered on behalf of all men
This verse is about the living. For kings and all those in authority. If your dead I don't see you being a king or in authority.
John 5:
22Moreover, the Father judges no one, but has entrusted all judgment to the Son,
23that all may honor the Son just as they honor the Father. Whoever does not honor the Son does not honor the Father, who sent him.
24“Very truly I tell you, whoever hears my word and believes him who sent me has eternal life and will not be judged but has crossed over from death to life.
25Very truly I tell you, a time is coming and has now come when the dead will hear the voice of the Son of God and those who hear will live.
26For as the Father has life in himself, so he has granted the Son also to have life in himself.
27And he has given him authority to judge because he is the Son of Man.
28“Do not be amazed at this, for a time is coming when all who are in their graves will hear his voice
29and come out—those who have done what is good will rise to live, and those who have done what is evil will rise to be condemned.
30By myself I can do nothing; I judge only as I hear, and my judgment is just, for I seek not to please myself but him who sent me.
Nothing about praying for the dead.