Because it lets you sync your passwords anytime, without having to connect to the VPN first, which saves time. And the risk of data leak is not really there since the passwords are encrypted by a strong master password anyways. With Vaultwarden, you can host your database even publicly and share it on Lemmy and nothing would happen, provided you use a strong master password, which you definitely should.

What’s the issue of exposing this one to the internet? Even if the database gets leaked somehow, your passwords are still protected by a hopefully strong master password + strong encryption

I hate to say this but it’s gonna be expensive obviously compared to what you can get from China. Just look at the CPU - for a NAS, it’s a huge overkill. Aoostar WTR Pro looks identical for NAS storage needs and costs around 300 euros on AliExpress. I don’t see this thing being priced any lower than that