The rest of your post doesn't seem to have anything to do with the issue.
As Scripture indicates, those in heaven are aware of the prayers of those on earth. This can be seen, for example, in Revelation 5:8, where John depicts the saints in heaven offering our prayers to God under the form of "golden bowls full of incense, which are the prayers of the saints." But if the saints in heaven are offering our prayers to God, then they must be aware of our prayers. They are aware of our petitions and present them to God by interceding for us.
Some might try to argue that in this passage the prayers being offered were not addressed to the saints in heaven, but directly to God. Yet this argument would only strengthen the fact that those in heaven can hear our prayers, for then the saints would be aware of our prayers even when they are not directed to them!
In any event, it is clear from Revelation 5:8 that the saints in heaven do actively intercede for us. We are explicitly told by John that the incense they offer to God are the prayers of the saints. Prayers are not physical things and cannot be physically offered to God. Thus the saints in heaven are offering our prayers to God mentally. In other words, they are interceding.
Not only do those in heaven pray with us, they also pray for us. In the book of Revelation, we read: "[An] angel came and stood at the altar [in heaven] with a golden censer; and he was given much incense to mingle with the prayers of all the saints upon the golden altar before the throne; and the smoke of the incense rose with the prayers of the saints from the hand of the angel before God" (Rev. 8:3-4).
And those in heaven who offer to God our prayers aren’t just angels, but humans as well. John sees that "the twenty-four elders [the leaders of the people of God in heaven] fell down before the Lamb, each holding a harp, and with golden bowls full of incense, which are the prayers of the saints" (Rev. 5:8). The simple fact is, as this passage shows: The saints in heaven offer to God the prayers of the saints on earth.
Just a sidebar, a POV that has not been discussed.
For many Christians praying/singing is their highest form of worship.
For Catholics the Mass is their highest form of worship.
For Catholics prayer is mainly a tool of communication between heaven and earth. Saints are those that are
physically dead but
still spiritually alive in Christ. Catholics do not view themselves as being separated from those in Heaven. There is a constant flow of communication via prayer, visions, miracles and visits e.g. Jesus visiting Sister Faustina
Many non-Catholics become outraged with the notion that we are praying to someone other than God because for them that is their
highest form of worship.
We all pray to God but we believe the more people you have praying for you, the better. And so we ask the Saints who have completed the journey to pray for us.