They probably think it’s safer somehow. But I don’t really get how.
Most built-in password managers allow for you to setup a master password of sorts if you try to sync everything to a new device, and most also require you to use your computer’s native verification to view a single password in plaintext or export all of them as plaintext. (For browsers on Windows, they use Windows Hello; for browsers on Android, they use the fingerprint scanner or the lock screen pin.)