I am glad you brought this up! Now, let us examine this passage together.But... The scripture must be fulfilled....
37 But as the days of Noah were, so shall also the coming of the Son of man be.
38 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noe entered into the ark,
39 And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be. - Matthew 24
First world - The flood came unlooked for
Flood - The death of the old world
Second world - Christ will appear unlooked for
Tribulation - The death of the current world
It must needs for words like the rapture dissipate away so we can continue to liken that event to the death of the first world.
For the coming of the Son of Man will be just like the days of Noah. For as in those days before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, and they did not understand until the flood came and took them all away; so will the coming of the Son of Man be. Then there will be two men in the field; one will be taken and one will be left. Two women will be grinding at the mill; one will be taken and one will be left.[Matthew 24:37-41 NASB95]
Jesus uses Noah as His reference point. Who were the ones who remained and who were the ones swept away in judgment? It was the unbelievers [wicked] who were swept away in judgment via the flood, not believers. The rapture has this completely backwards. The wheat and tares, it was the tares cast into the fire, the wheat remained. This portion of Matthew 24 pointed to AD 70 and the destruction of the temple and judgment upon unbelieving Jews who denied Christ as their Messiah. The unbelieving Jews were taken away in AD 70.