It walks like the rapture and talks like the rapture, in that it involves the Lord appearing in the clouds, the trumpet, and gathering the elect.
But pretribulationists reject this passage for two reasons that are both fallacies.
1. Because they have it in their mind that the rapture MUST take place before the "7 year tribulation" (a phrase NEVER used in the bible. Pay attention to where Jesus says the Great Tribulations begin and it's only after the midpoint, NOT 7 years), they immediately discard any scripture that suggests otherwise. That's eisegesis, that's coming into the Word of God thinking you already know what it says rather than letting the Word of God speak to you.
2. They claim that the chapter is "for the unbelieving Jews not the Church", yet they're perfectly comfortable using the chapter ASIDE from these verses as signs pointing to the rapture. Not to mention, Jesus wasn't talking to unbelieving Jews here He was talking to 4 apostles that would be the seeds of the Church. This was for believers, not unbelievers.
Finally stop claiming this is about the second coming of Jesus as shown in Revelation 19. This is not that. There's no horse, and He's gathering the elect, that is, believers like the Apostles, not unbelievers. The only thing being gathered at Armageddon is unbelievers doomed to be destroyed. The parousia is an enduring presence with multiple events taking place during it. It begins at the rapture, and never ends, it is ALL the second coming.
Compare Matthew 24 to Revelation 6:12-17. NOT Revelation 19.
May it open your eyes.
It seems like the day of judgement when Jesus will save the righteous.
Luke 17 (WEB)
The Coming of the Kingdom
20Being asked by the Pharisees when the Kingdom of God would come, he answered them, "The Kingdom of God doesn't come with observation;
21neither will they say, 'Look, here!' or, 'Look, there!' for behold, the Kingdom of God is within you."
22He said to the disciples, "The days will come, when you will desire to see one of the days of the Son of Man, and you will not see it.
23They will tell you, 'Look, here!' or 'Look, there!' Don't go away, nor follow after them,
24for as the lightning, when it flashes out of the one part under the sky, shines to the other part under the sky; so will the Son of Man be in his day.
25But first, he must suffer many things and be rejected by this generation.
26As it happened in the days of Noah, even so will it be also in the days of the Son of Man.
27They ate, they drank, they married, they were given in marriage, until the day that Noah entered into the ship, and the flood came, and destroyed them all.
28Likewise, even as it happened in the days of Lot: they ate, they drank, they bought, they sold, they planted, they built;
29but in the day that Lot went out from Sodom, it rained fire and sulfur from the sky, and destroyed them all.
30It will be the same way in the day that the Son of Man is revealed.
31In that day, he who will be on the housetop, and his goods in the house, let him not go down to take them away. Let him who is in the field likewise not turn back.
32Remember Lot's wife!
33Whoever seeks to save his life loses it, but whoever loses his life preserves it.
34I tell you, in that night there will be two people in one bed. The one will be taken, and the other will be left.
35There will be two grinding grain together. One will be taken, and the other will be left."
36 37They, answering, asked him, "Where, Lord?" He said to them, "Where the body is, there will the vultures also be gathered together."