Lisa, thank you for your comment.
I have been pondering how best to answer your question about why we pray to the Father, yet rely upon Christ for “all good things” to come into our lives. You mentioned that you would find it hard if in your mortal world you asked your father questions which only your brother answered.
I hope this small explanation helps. The relationship which the Father and the Son have makes them one. When it comes to their work among mortals, they are so perfectly joined that they are essentially one person, even though they remain two distinct beings.
Yet, their Oneness does not mean that they are alike. It means that they are perfectly aligned in the cause of exalting mankind. They are very different in how they have established their relationships with mankind.
The Father remains a being of law and justice. Everything He does must conform to laws He established, and must be perfectly just. This means that He can’t give us something we don’t deserve, or haven’t earned. There is a planet-sized list of things we haven’t earned – among them almost every gift and blessing we receive. As King Benjamin notes, we are unworthy and unprofitable servants. Part of the justice of these things also means that if Father gave any random or unearned blessing for any one of us, that He would be obligated to do the same thing for every mortal in the same circumstances, or else he would not be just.
The Father loves us of course, and desires to bring us back into His presence. To accomplish this, He implemented a plan whereby mercy and forgiveness can be extended by virtue of the Atonement. Jesus Christ adopted the Father’s plan as His own, and being innocent from the beginning, paid for the sins of mankind, thus making it possible for the Father, through Christ, to extend mercy to us.
When it comes to prayer, we pray to the Father because we have been instructed to pray “in the name of Christ” to the Father. When the Father answers our prayers He relies upon His Son’s Atonement to dispense blessings which we have not earned, but for which we have qualified by obedience to Christ’s laws.
Depending on how that answer was framed, what our needs were, what our level of righteousness is, and our ability to discern truth, that answer could come a million ways. A living mortal might be inspired to help us, or the Holy Spirit might whisper truth, or we might see an vision or angel. All of these potential outcomes are made possible because of the Atonement of Christ, but come through a different divine means.
When it comes to worship, and thanking Christ for what He did for us, we follow Christ’s pattern. He said “the glory be Thine forever”. So, whatever glory the Son brings into our lives, we worship the Father, as does the Son. And since the Father and the Son are one, worshiping the Father also worships the Son. They cannot be separated for veneration.
The message and lesson of Abraham wasn’t the awfulness of the Son’s atonement, but the sacrifice of the Father in giving His son. When we ponder during the sacrament and our thoughts rise up in joy and awe because of Jesus Christ’s sacrifice, even though our thoughts are of Christ, our worship is ascending to God – the “one” God, of whom the Father is the head, and our worship is pure. When we think or sing of His hands and feet bleeding to pay our debt, we are worshiping the Father, even though our words sing of the Son.
I hope this helped.