I imagine part of it is also zero acceptance for failed launches. It needs to always work
Missiles definitely do not always work. I have seen film of a Sea Slug missile (with war head) falling over the side of a Royal Navy ship, without the motor firing properly. Apparently there was a void in the solid propellant.
alt Hacker News
Missiles definitely do not always work. I have seen film of a Sea Slug missile (with war head) falling over the side of a Royal Navy ship, without the motor firing properly. Apparently there was a void in the solid propellant.