macOS Tahoe Beta Forces Sharing FileVault Key

Rather, if you install it on an unencrypted drive, it'll turn FileVault on and then save a backup of the key to iCloud.

Not sure if this is just a beta issue or it was intentional. It would be annoying for people who don't want encryption, but I guess for most people, an encrypted drive + iCloud key is probably better than an unencrypted drive.