How secure is Vaultwarden?
The logic is simple, Bitwarden is not there to detect intrusion attempts and safeguard your server so you gotta do it yourself, that's why its free.
But I think it can be assumed that someone asking such a questions is highly unlikely to be a world-class security researcher equipped to answer it for themselves by auditing the source code, so your response comes across as snarky for the sake of snark.