Have you actually met anyone, in real life, who bought all the variants?
I haven't, and I know a lot of Swifties and have been to a good few Swiftie events.
I've seen posts from a few people who were watching her website and Instagram for countdowns like a hawk and ready and waiting, day or night depending on time zone, to immediately buy them as they dropped, and then lovingly placing them in their shrine to Taylor room. That's not normal behaviour, these are people who have an obsession, possibly it's their special interest and they have ASD, but most Swifties sleep, eat, have jobs and don't make it their entire personality. Most of the people I know didn't even buy a CD, they just listen on Spotify or Amazon Music.
If those people weren't buying variants of LOASG they'd be trying to collect every single Hornby train set or searching for rare Beanie Boos. It's not about Taylor, it's just a personality type, and a rare one at that.