Some cyclists enjoy the nose pointing up skyward because numbnuts syndrome is fun for them.
Some cyclists enjoy the nose pointing up skyward because it creates a hammock for the b17 saddle and they stay put in the middle of it.
B17 saddles are, to me, something that is more for function than form. Ive never seen a b17 with the nose pointed up 25 degrees and thought- 'wow that looks great!', but Im sure the fit and comfort is fantastic for the user.