Realistically their does need to be some consideration but the medium they travel isn’t air, but the occasional speck of dust, hydrogen atom, and other small stuff. It’s not much but for interstellar travel there are still considerations needed, namely reducing your cross sectional area in the direction of travel. Long and thin gives you less drag since it hits less stuff.
Regardless the airplane looks doesn’t make much sense anyway :)
Just remember that Orson Scott Card is a massive homophobe!
Good books though.