My brother in law was an engineer who worked on the shuttle launching pad.
Stories about the contracts, sub contracts, etc. would lead us to believe it was a miracle anything got off the ground.
He was on the Cape when the astronauts were burned up in the fire. Imagine piping pure oxygen into the capsule. As if no one thought of the terrible fire hazard.
He told us that the entire Cape was locked down and everyone questioned by the FBI to be sure it wasn't sabotage.
Some chances taken in the pursuit of saving time or money or both result in death. Also, let's not forget ego.