How is having that knowledge any different to if you knew the mathematics involved in the building and launching of the rocket? Knowing that didn't help you at

How is having that knowledge any different to if you knew the mathematics involved in the building and launching of the rocket? Knowing that didn't help you at all. If you didn't know about Hydrogen that rocket still would have launched. It's purely for your own interest. Unless you're a SpaceX engineer of course but then the other 99.9% of the people on the planet don't "need" to know about the size of Hydrogen and we are back to the same argument.