Rapture - the recurring word in death doom songs

So recently after listening to some Rapture (band) but also October Tide and Paradise Lost, I couldn’t not stop and wonder why do all these bands use this pretty niche word so extensively and what does it mean in the context it is used. Some examples where the word is used are:

- Rapture - well… rapture is the band’s name, enough said
- October Tide - in the track Sleepless Sun from the Winged Waltz album
- Paradise Lost - one of the songs on Gothic is named Rapture

Now at this point you might be wondering: “what the fuck is he talking about, I mean it’s just a word”, well yes, but that word to my enormous surprise as a non-native English speaker actually means “extreme pleasure and happiness”. Now I don’t know about you, but those bands don’t exactly scream “happiness” to me…

So why does a band with extremely bleak themes name themselves Rapture? Why is a song about agony and death called Rapture? Is there something I’m missing here or is it just for contrast?