I agree. This is one plausible understanding. Let's remove a bit of your proposal so that I can ask you a question
Original Proposal:
Just as it was in the days of Noah, so also will it be in the days of the Son of Man:
People were eating and drinking, marrying and being given in marriage, up to the day Noah entered the ark.
Then the flood came and destroyed them all.
Modification (for the purpose of discussion only.)
Just as it was in the days of Noah, so also will it be in the days of the Son of Man:
People were eating and drinking, marrying and being given in marriage,
Then the flood came and destroyed them all.
Question? After removing the sentence about Noah entering the ark. Did we lose Jesus' point?
Supposing for the sake of discussion, Jesus meant to illustrate the idea that sometimes disaster strikes while people are unaware. Both examples above make that point, right? People were going about their normal lives and then the flood took them all away.
But Jesus included the fact about Noah entering the ark and so we must conclude that it matters to the point Jesus wants to make. I think we can both agree that his remark about Noah entering the Ark isn't a throwaway phrase. Jesus mentions it because he intends to say more about his coming than "people will be caught unawares." Right?
I'm not arguing here, just thinking about it aloud. Jesus seems to be saying more than "expect the unexpected."
In Luke Jesus uses Lot to make the same point. I don't think we can say that if the citizens of Sodom were expecting the unexpected, they would have been saved. None of the citizens of Sodom expected destruction, not even Lot. He also was unaware of the destruction until the day that the Angles removed Lot from Sodom. Lot had no advanced warning and neither did he have prior warning of the event.
Can't we say that although God decided to destroy a city, in his mercy he decided to save a few people? Does Jesus mean to say, "When the son of man comes, many people will get caught in an unexpected disaster but God will save a few people?
And how will he save them? He will take them out of the way?
Just discussing.
Lot knew that the people of Sodom & Gomorrah were vile and in deep sin against God.
2 Peter 2: 4-11
For if God did not spare the angels who sinned, but cast
them down to hell and delivered
them into chains of darkness, to be reserved for judgment;
5and did not spare the ancient world, but saved Noah,
one of eight
people, a preacher of righteousness, bringing in the flood on the world of the ungodly;
6and turning the cities of Sodom and Gomorrah into ashes, condemned
them to destruction, making
them an example to those who afterward would live ungodly;
7and delivered righteous Lot,
who was oppressed by the filthy conduct of the wicked
8(for that righteous man, dwelling among them, tormented
his righteous soul from day to day by seeing and hearing
their lawless deeds)—
9then the Lord knows how to deliver the godly out of temptations and to reserve the unjust under punishment for the day of judgment,
10and especially those who walk according to the flesh in the lust of uncleanness and despise authority.
They are presumptuous, self-willed. They are not afraid to speak evil of dignitaries,
11whereas angels, who are greater in power and might, do not bring a reviling accusation against them before the Lord.
Notice how both the LORD and the Apostle Peter connect Noah and Lot and the destruction that came down.
The emphasis by the LORD and the Apostle Peter is:
#1.) God knows who belong to Him and He is able to keep them from Judgment
#2.) The world does not know God, neither do they desire God = 2 Thess ch2
#3.) Judgment/Wrath is coming again because the same vile sins are being committed as in the days of Noah and Lot.