“If a devout Christian does not believe in the Rapture and the Rapture is real or happens, then would they be caught up as the Rapture folks believe?” Yes ... see you in the clouds! (1 Thess 4:13 - 18)
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 (1Th 4:16).
If the Rapture supposedly happens in secret then what's with the shouting and horn tooting? Only Christians will hear it? Will CNN and MSNBC cover it? Will Jim Acosta be reporting?