Am I missing something? Why is everyone talking about sandboxes when it comes to OpenClaw?

To me it's like giving your dog a stack of important documents, then being worried he might eat them, so you put the dog in a crate, together with the documents.

I thought the whole problem with that idea was that in order for the agent to be useful, you have to connect it to your calendar, your e-mail provider and other services so it can do stuff on your behalf, but also creating chaos and destruction.

And now, what, having inference done by Nvidia directly makes it better? Does their hardware prevent an AI from deleting all my emails?

I think the point you're making is fully correct, so consider this a devil's advocate argument...

People claim, you can use Claw-agents more safely while getting some of the benefits, by essentially proxying your services. For example on Gmail people are creating a new Google accounts, forwarding email via rule, and adding access to their calendar via Google's Family Sharing. This allows the Claw agent to read email, access the calendar, but even if you ask it to send an email it can only send as the proxy account, and it can only create calendar appointments then add you as an attendee rather than destroy/altering appointments you've made.

Is the juice worth the squeeze after all that? That's where I struggle. I think insecure/dangerous Claw-agents could be useful but cannot be made safe (for the logical fallacy you pointed out), and secure Claw-agents are only barely useful. Which feels like the whole idea gets squished.