People aren't the target audience of that part of the post. They're hoping saying enough safety stuff will ward off the looming regulatory sledgehammer.

They actually want that to come protect their business model

One of my favorite things about self-hosted Vaultwarden is that you get distributed backups for free. Every client keeps an offline copy of your entire password vault, kept in sync when the client is online.

So for me to lose my vault, not only would my server have to get hit by a bus, but also my phone, my desktop, my HTPC, both laptops...

True.. but now you have more devices to have to secure against attacks...

Edit: this "feature" did save me when my home hosted vaultwarden died due to hdd failure.

I've been using https://binvis.io for this when I just want quick-and-dirty color coding to see what the heck I'm looking at.