Please choose:
Let the implementation proceed. The insurance case was poor execution, not a structural problem. Our safeguards are better.
Ask the implementation team to address the insurance case in the Q&A. Keep the meeting moving.
Raise the insurance case as a risk to be managed, and request a modified timeline with additional safeguards.
Say: "Before we proceed, I want to name what I think we are looking away from. Can we spend thirty minutes asking not 'Can we deploy?' but 'Should we — and if so, how, and what must we protect?'"