@surveyor3 So there's actually two schools of thought on rocket development. One approach says you should design and test every single little component to high hell, over design everything, and make sure that under no circumstances will your rocket ever explode. This is how NASA develops rockets.
But doing all of that is extremely expensive in development, and it leads to expensive rockets. That's fine when you have the United States Congress funding your launches.
Another school of thought says - do your best and test to failure, then fix it repeatedly until it no longer fails. This is how SpaceX does it. Even though some rockets will explode, this approach is cheaper in the long run.