You are employing a spurious hermeneutic. Doctrine is not based on what God could do, which cults like Mormonism partly argue from, but what He states He does or will do. And thus the question is, why did the All-Powerful God not provide even one example among the multitudes of prayers in Scripture of any believer praying to anyone in Heaven but the Lord, or in any instructions on who to pray to in Heaven, while also manifesting a division btwn the 2 realms so that personal communication btwn created beings from each sphere required both to be in the same place, versus talking to angels or saints in heaven from earth.
(That sounds like those strict Amish or Quakers who don't believe in riding in cars or planes, or watching television. because they were not mentioned in the Bible.)
The New Testament does give examples of Christians asking for prayers from other Christians, such as this request: "I urge you, brothers, by our Lord Jesus Christ and by the love of the Spirit, to join me in the struggle by your prayers to God on my behalf." (Rom 15:30)
How this applies to saints who have died is discussed more fully and competently in a scripture-filled article about this subject that I referred someone else to in a previous post, which is located here:
"Any Friend of God is a Friend of Mine" By Patrick Madrid
I urge you (and all here) to read that illuminating article prayerfully.
Goodnight all.