God has a long history being very clear in His message to mankind. God doesn’t need secret codes.
It is not a “secret message” it defines the boundary conditions of the Universe. It is how He made it all, and established the end from the beginning.
However, Jesus actually said that he talked to the multitude in parables because it was not given to them to understand. Peter, Paul and John talked of mysteries.
We still don’t know what the Seven Thunders said, because John was instructed to refrain from writing it down.
When Peter asked the Risen Jesus what was going to happen to John, Jesus told him it was none of Peter’s business what Jesus did with John.
So when some of the secrets of the future are revealed, we should be happy to be told, and thank YHWH that He cares enough about us to tell them to us.