What light does Matt 24:37-39 shed on this moment of the narrative (Gen 7:1)?

Here is the text in question: “But as the days of Noe were, so shall also the coming of the Son of man be. 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, and knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.” (Matt 24:37-39) We are here to understand that, at the second coming of Christ, several things will occur again that occurred in Noah’s time: (a) blithe and corrupt man will live as if he had all the time in the world, (b) a faithful remnant will be saved, while (c) destruction will come upon the rest suddenly. The Flood is the first of several scenes of total or near-total destruction: that of the Egyptians; of the Canaanites; of Israel (the northern kingdom) and then Judah (the southern kingdom); of others as well; and then, finally, of the second coming and the destruction, followed by the new creation, of the whole world.