Believing in the Rapture as a comfort does not say anything about how it may be truly taught in Scripture. On the same token, we could say that people taking comfort in the Biblical concept of going to heaven makes it a doctrine that is pure opinion. This is not the case. (Prepare for a long read, if you so desire to understand why people really believe in the Rapture.)
The Christian view of the Rapture (an English theological word that does not appear in the Bible) is really a different interpretation of what the Jews call "The Resurrection of the Dead". That is, the Resurrection of the Dead is an event said to take place in the Messianic Age when all of those that are dead and are righteous will be raised up to live with God, and the wicked will not. The preaching of this concept can be found in Jesus' sayings in John 6 (possibly other places, but this isn't an exhaustive study). The Resurrection of the Dead is also spoken of by Paul in many passages, he himself being a former Jewish Pharisee.
We draw much of what we believe about the Rapture of the Church in Christianity from the writings of Paul, which are a Christian perspective of the Jewish conception of the Resurrection of the Dead. The only way to determine this doctrine is through the interpretation of Scripture. However, just because we interpret Scripture, it does not automatically make it subjective opinion. With that said, here are a couple of passages that give us insight into the Rapture:
1. In 1 Thessalonians 4:13-18, particularly in verses 16-17, we read: "16 For the Lord Himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. 17 Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord." This is Paul's take, under the inspiration of the Holy Spirit, on the event of the Rapture. He speaks of the original thought of the Resurrection of the Dead in verses 13-15, and goes on to tell us in verses 16-18 that those who are still alive will be caught up to meet God in the air.
2. Going off of point (1), there is additional Scripture we gain from Paul that the Rapture is a literal event that will involve the transforming of our bodies and meeting God in the air as 1 Thessalonians 4:17 says. This is in 1 Corinthians 15:50-54. That is, at the sounding of the "last trumpet" Jesus Christ is going to descend and we are going to meet him in the air, which is a further elaboration of the above scriptures. Paul says: "51 Behold, I tell you a mystery: We shall not all sleep, but we shall all be changed-- 52 in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed." He says we SHALL not die when that last trumpet takes place, but will transformed in a moment. In effect, this event will be similar to how Jesus ascended into heaven.
3. Not only that, but the fact Jesus ascended in His glorified, resurrected body, is considered the "first fruits" (1 Corinthians 15:20). This is understood by theologians today to refer to the promise of our Rapture, for since Christ was risen, we will be also.
4. Also take note that the idea of Jesus returning again is corroborated in the book of Acts, which the angel tells the crowd that Jesus will descend in the same way he ascended (that is, in his Resurrected body). See Acts 1:11.
In essence, the concept of the Rapture is clearly taught in New Testament theology. Furthermore, it has its roots in the Jewish concept of the Resurrection of the Dead. This is not a subjective opinion, but what the Bible teaches us plainly. The idea of the Rapture is not one we ought to stress about or overly worry about, but take comfort in. When Paul concluded his statement I quoted above in 1 Thessalonians 4, he states "comfort one another with these words." I hope what I have said helps you and may in effect be something that comforts you.