The reassuring factor is that the nuclear arsenal was built by firms that specialized in contract and bid engineering, not weapons engineering.

I feel like there's an interesting premise for a post-apocalyptic story; we find a missile base, fully intact, but it's obvious all the launch processes were attempted. As they explore further, we discover the missiles had been sabotaged by industrial incompetence and willful corner cutting. The crew is greeted by the attackers as heroic collaborators, and there's a comical "don't say anything" moment when someone starts to mention the truth.