[vidarh]

Limiting the blast radius when a bomb goes off is still helpful even if you don't prevent the bomb from going off.

Now, you're right that sandboxing them is insufficient, and a lot of additional safeguards and thinking around it is necessary (and some of the risk can never be fully mitigated - whenever you grant authority to someone or something to act on your behalf, you inherently create risk and need to consider if you trust them).