Vanderhoven,
You said “No one will be able to anticipate the timing; it will take place in normal times, with people working at their jobs, marrying and being given in marriage; it will be a total surprise, an event one should be ready for at all times...precisely because there will be no signs of his second coming (parousia).”
You have ignored description of “Last Days” in Luke which is truer than that of Mathew because Luke compared all available manuscripts and took only what is true. (Luke 1:1-3) After describing all the global signs such as pandemics, world wars, sea-level rise, Jesus said: “People will faint from terror [thus they are not taken by surprise], apprehensive of what is coming on the world, for the heavenly bodies will be shaken. At that time they will see the Son of Man coming in a cloud with power and great glory. When these things begin to take place, stand up and lift up your heads, because your redemption is drawing near.” He told them this parable: “Look at the fig tree and all the trees. When they sprout leaves, you can see for yourselves and know that summer is near. Even so, when you see these things happening, you know that the kingdom of God is near.” (Luke 21:26-31)
Noticeable thing is that Luke removed Jesus’ supposed comparing the situation with that of Noah’s time. This is because Jesus never mentioned about Noah’s destruction as it has never happened (compare Mathew 13:24-30) After saying “mankind was made in the image of God” (Genesis 5:1) we find in the very next chapter God repenting about His creating mankind on earth because they have become wicked from their very core, hence HE supposedly wiped that generation (Genesis chapter 6). This is unlikely to happen, and Noah’s Flood is a cooked up story, adopted from other cultures and was put in wrong place. This explains why OT prophets are not aware of such global flood that destroyed mankind except one family.