

They won’t keep exploding, they just aren’t finished yet. It’s a different way of developing. You can spend lots of time and money validating your designs by calculating and modeling them, come to the conclusion it would have exploded, and go back to the drawing board (which is basically what NASA does) but it’s cheaper and faster to juist build one and see if it explodes. It just makes the inevitable bugs in the design a lot more visible to the public.
Add to this that even the best modeling doesn’t completely match with reality. For all their effort in getting it right the first time there were also issues with the Artemis 1 mission, maybe not as spectacular as an exploding rocket but it just goes to show that real life testing is a better method of exposing flaws.
It’s easier to generate electricity during a zombie apocalypse than to pump up oil and refine it into gasoline. Let alone if you have to actually prospect for oil and drill an oil well.
So many ways to easily create and store energy using an alternator and some lead batteries. You can make a windmill, use a stream and a watermill, basically anything you can make rotate can be used as an energy source.