Do not show a particular vault in startup options

What I’m trying to do

I have more than one vault. One vault contains details of patients. Ideally, I would like to never see that vault listed as an option in the opening dialog of Obsidian. I would have to manually “Open folder as vault” instead.

If necessary, I would be happy to never see any vaults listed as pre-existing options.

I am not relying on security by obscurity. This measure would be a paranoid addition to disk encryption, strong passwords, and not leaving my computer unattended.

Things I have tried

I used the three dots next to the vault name to remove it from the list, but it reappears after the next time I open it.

I managed to hide the vault switcher within obsidian using this CSS snippet

.workspace-sidedock-vault-profile {
        display: none !important;
}

but I don’t know how to target the opening dialog.

Any help greatly appreciated.

I’m guessing from the lack of responses that this is not a solvable problem. Am I correct?