Indeed the rapture is a harvest of sorts. But however described, and however the rapture is accomplished, it still bears witness to also state, that it is also a judgment of God. A judgment against those who did not answer the Lord's call to relationship or convenant life. This then is a universal judgment against believers/church and non. And though not a judgmental act in and of itself, it does usher in the "judgements" of God. The rapture is a judgment of sorts in that it declares a decision made by God. In that sovereign decision, He chooses those that are declared worthy to spend eternity in His presence, and those that have chosen Christ. Analogies aside, as they are for the sake of our understanding of His purposes, again it is a sovereign decision, made by God.