Except they absolutely influence each other and to pretend like there is a world where one exists without the other, especially building a spaceworthy rocket, is just wrong. Aerospace principles are highly intertwined even if the application of knowledge gained from either is applied differently.

I would say that they’re like brushing and flossing. Very different on the face of it but the background to either is completely linked to the other. Each informs and aids the practice of the other.