Bitwarden has never been breached AFAIK.
What you mean is it hasn't been breached *yet*.
All commercial password managers have a huge, fuck off, target on their backs
Nobody is going to come after some random blokes self-hosted password manager to get access to their Sonarr (I'm trivialising to make the point) as long as if a similar effort would get them into Bitwarden.
It's the same principal as bears in the wood - nobody needs to outrun a bear, just your companion