With that understanding, I think the question should be “Why would I consider leaving the Catholic Church established by Jesus Christ to join another church established by man?”
Many Jews followed Christ and became the first Christians and many were martyred for their faith.
Many have left for Catholic Church for various reasons, but the Catholic Church survives and is strong as Jesus promised. The Catholic Church is for saints and sinners and our mission is to lead others to Jesus Christ in Heaven. Jesus is the judge who will determine their salvation.
God gave us the freedom to make decisions to either follow God's will or NOT.
Your assumptions about the Catholic Church are not correct.
Your first statement is wrong as the Catholic sacraments are all based on the Bible and our sacred tradition is based on the early christian bishops and Popes. The Magisterium is based on the authority delegated to the Catholic Church by Jesus.
The second key difference is that Catholics approach God through intermediaries. You do not understand the Mass or the sacraments. Your statement is factually incorrect.
The third point. Catholics believe that if one dies in Mortal sin, then you will not enter the kingdom of God.
You are entitled to your opinion and attempts to spread the word of God, but you should not erroneously represent the teachings of the Catholic Church.
May God's Peace be with you and guide you to the Truth.
Sacred Tradition (Big T tradition) is the Deposit of Faith instruction given by Christ to the Apostles for the administration of His Church. Yes, it has been faithfully handed down by the bishops and popes, but they are not the progenitors.