You cannot take a single verse out of context like that. Luke 17:27 "People were eating, drinking, marrying, and being given in marriage up to the day Noah entered the ark. Then the flood destroyed them all." Jesus is referring to an event that happened very early on in the bible. This one verse is referring to Genesis where God's wrath destroyed the world and He started the world over. The old testament is full of God's wrath as that was his only way of atonement before Jesus. This single verse is not about Jesus at all, but about God's works before the time of Jesus. To understand this one verse you need to read multiple passages before and after it. To get a full understanding, I suggest reading Luke 17:20-33.
"20 Once, on being asked by the Pharisees when the kingdom of God would come, Jesus replied, “The coming of the kingdom of God is not something that can be observed, 21 nor will people say, ‘Here it is,’ or ‘There it is,’ because the kingdom of God is in your midst.” 22 Then he said to his disciples, “The time is coming when you will long to see one of the days of the Son of Man, but you will not see it. 23 People will tell you, ‘There he is!’ or ‘Here he is!’ Do not go running off after them. 24 For the Son of Man in his day will be like the lightning, which flashes and lights up the sky from one end to the other. 25 But first, he must suffer many things and be rejected by this generation. 26 “Just as it was in the days of Noah, so also will it be in the days of the Son of Man. 27 People were eating, drinking, marrying and being given in marriage up to the day Noah entered the ark. Then the flood came and destroyed them all. 28 “It was the same in the days of Lot. People were eating and drinking, buying and selling, planting and building. 29 But the day Lot left Sodom, fire and sulfur rained down from heaven and destroyed them all. 30 “It will be just like this on the day the Son of Man is revealed. 31 On that day no one who is on the housetop, with possessions inside, should go down to get them. Likewise, no one in the field should go back for anything. 32 Remember Lot’s wife! 33 Whoever tries to keep their life will lose it, and whoever loses their life will preserve it."
This whole part of the passage is about the coming of the Son of Man. He is foretelling the future, per se to His disciples. Jesus is saying that most people will not realize who the Son of Man is until it is too late. Just like in the days of Noah and Lot, there will be death and destruction and only those who know God and give their life to Him will be saved.
This verse and whole passage has nothing to do with Jesus' character, but rather, what will happen on the day the Son of Man is revealed. I hope this clarification is helpful for you!