Because the holy scriptures are the counsel of God; as revealed to true prophets as the Anointing that was in them taught them; they wrote it down. (2 Peter 1:20) Anyone who calls themselves Christian but who disagrees or doesn't consent to the faithful teaching which the scriptures reveal is lifted up in their own mind and is too proud and knows
nothing as Paul said. (1 Timothy 6:3-4) Let them mock; but God will show favor to those who are humble and tremble at His Word. (Isaiah 66:2)
As for Michael. I couldn't disagree with you more.
The angels are not begotten. They are created sons of God like Adam. But Jesus is the only
begotten Son of God because He was literally born of the virgin. (Luke 1:35)
Michael is not the master worker. He is a powerful archangel and prince but he is not the Word of God. Jesus is called the "Alpha and the Omega" because He is all of God's Word. All words are comprised of letters. The Alpha and the Omega are the first and last letters of the Greek Alphabet showing that Jesus is
all of God's Word.
God commands all the angels to worship Jesus. (Hebrews 1:6)