Justin Vernon disappeared to a cabin in Wisconsin for months, where he wrote and recorded one of the greatest and most popular folk rock albums of all time.
The big thing there is, that he already was a professional musician and completely inside a creative scene before leaving for the cabin. (DeYarmond Edison was the band he was in before Bon Iver.)
But yes, things were going way sideways for him, liver issues with mono, so he went to process whatever was going on and had been going on in complete isolation. (Although for the next album, he actually set up a whole "creative commune", a new band around Bon Iver instead of it being just himself, and so on. And I think you can hear the colors he wanted back in the music from it directly.)
A lot of examples of artists going into bouts of isolation, but almost always coming into it from an intense experience. So, the two don't have to be day to day intertwined, although for Techno specifically it's usually the case.
How often do you listen to a song and think of these stories in your head? When you listen to the Beatles are you seeing Paul McCartney singing? I think for many people the answer is yes. These things (the story and the music itself) become connected and the story provides the context within which many people enjoy the music.
I'll admit this is a bit disappointing. I'd like to think that any piece could stand up on its on merits without some lore being required to appreciate it. But I have relented to the idea that this is just a very human thing. We do it with everything as it's just the way most of us are wired.
It seems like the majority of music I listen to has no lore attached to it.