The people at the time of TheFlood had completely disconnected from the Lord and His purpose for them.
The Lord destroyed that generation because they were filthy, dishonourable and irreversably aligned with satan.
The elites of this world (who control the SevenMountains of influence) are in the same state of corruption as during Noah^s day. They too will be destroyed.
The Lord saved Noah and his family while He destroyed everyone else.
When Jesus returns He will do the same thing. He will catch all believers, dead and living, up to Him in the air. Then He will destroy the unbelievers and their monuments with the WordOfHisMouth.
And just as there was a new beginning for the world under Noah, there will be a new MillennialKingdom under our Lord Jesus Christ.