The advice from Brooks used to be to have the nose and rear level due to the hammock design I think. Otherwise, it does seem a bit pointless/uncomfortable.
Well, they simply sag with use and get into the hammock shape where you're sitting in the middle just like in the horse saddle with nose pointing upwards.
Why do modern Brooks Wankers have their saddles pointing up their arses? LOOK AT ME I RIDE A LEATHER SADDLE.
The OGs in my cycling club with 30 year old Brooks saddles never had them at stupid angles. I blame Instagram.