>>Revelation 6 describes identical events Christ spoke of to His disciples in Matthew, Mark and Luke.<<
Matthew 24:5 - Many have already come claiming they are the Messiah. That is not restricted to the events of Revelation.
Mark 13:9/Luke 21:12 - That is the people of the nation of Israel. Reflect on what has happened to them in the last 2000 years. Again, not restricted to Revelation. In fact, for the first 3 1/2 years there is peace for the people of Israel and the last 3 1/2 years the chosen 144,000 are protected by God.
“That is not restricted to the events of Revelation.”
True, but the events of the Olivet discourse and Revelation 6 are a set of specific events in a precise order that serve as “signs” of the coming end of the age. Note the questions the disciples asked Christ:
Matthew 24:3
Now as He sat on the Mount of Olives, the disciples came to Him privately, saying, “Tell us, when will these things be? And what will be the sign of Your coming, and of the end of the age?”
Note also how these events are connected with the imminence of His return:
Luke 21:28
Now when these things begin to happen, look up and lift up your heads, because your redemption draws near.”
This is in contrast to the beginning of the church age in which Christ’s return was not imminent.
Acts 1:11
Men of Galilee, why do you stand gazing up into heaven? This same Jesus, who was taken up from you into heaven, will so come in like manner as you saw Him go into heaven.
The Olivet discourse also references Daniel’s seventieth week and the abomination of desolation.