They already had a big target on their back. Sure, scraping Spotify made that larger, but given that their aims are explicitly political, I think there's a lot of value in not being overly cautious and using takedowns as a way to bolster the resiliency of your service.

Domain takedowns are inevitable, even if they'd just continued with their existing archival efforts. That's why, when I found I wasn't able to access the .org domain over the weekend, I just went to https://annas-archive.se/ instead.

Edit: wrote one of the old domains (.gs) because I just use what's bookmarked and got mixed up. It was .se that I used