>Then using HashiCorp Vault isn't the silver bullet
Except it practically is.
That's like saying Linux isn't a silver bullet because ls doesn't make filesystems... You wouldn't use Vault to create SSH keys, nor should it. You wouldn't use ls to make filesystems, nor should it.
Nor should it. That's managed by ssh-keygen. Hello UNIX philosophy!
>so reading the docs or finding an expert on the allegedly easiest security tech wouldn't be of much help.
If you're not an expert or feel confident in secops, find someone who is. Security is obviously something that shouldn't be taken lightly.