1. It's now easier to access passwords on the mac because you no longer are forced to use Safari to view passwords, nor have to sort through the technical entries/certificates in Keychain Access.
2. The app surfaces a prominently positioned button for one-click sharing and exporting of passkeys/passwords, whereas existing methods significantly lack in comparison.
3. It's the opposite of lock in to consolidate all types of passwords into a single consumer-level interface, when the alternative was hunting for them across the various apps and system panels.
4. It works with iCloud for Windows for cross platform support. Which also means you don't need a mac to participate in shared password groups.