If it is for you, you are doing what is essentially a one-time task. If you RE-install, the setup doesn't happen.
If you do a clean install, which would be fairly unusual, you may be doing other things, either as prep for that with backups, and organizing your apps, etc, then the manual for a brand new system wouldn't necessarily apply, either - not for you, anyway.
I prefer to simply find my way through the screens (because i AM an Apple geek - 25 years now). Apple makes that easy, as most are self-explanatory, and usually not seen again after that first time (settings, names, passwords, network setup, etc may seldom change, once you "do the magic"