Yes there is. How many will fall away when the false prophecies fail to materialize? How many will die without seeking Christ, because they thought they had more time than they actually had? How many more reasons do we need to give the world to mock Christ? Isn't it hard enough to witness to a hostile world, without giving our enemies more failed false prophecies to use against us?
There is nothing new under the sun. Wars? What about the last century? Disease? What about the Black Plague, or the influenza following WW1? Evil? How about slavery? Lynching? Persecution of Protestants? There are plenty of others.
Have you noticed how many who have predicted when the end would happen who turned out to be wrong? 100%. With a batting average like that, why continue to push their prophecy?
Read Matthew 24.
If Jesus thought being aware of the signs of the end were wrong, He would not have given them to us.
And besides, people fall away because of SPECIFIC prophecies where people predict the day and the hour which Jesus said KNOW ONE would know.
They followed false teachers. THAT’S why they fell away.