Not that I'm saying you can't — or shouldn't — re-set options, just that the linked documentation is a little dated. FWIW, I personally re-set a couple of default options mostly so that I have a point of reference for how an option works when I'm digging about in my config.
I'm of the opinion that the combination of recent vim and Tim Pope's sensible.vim² is The Minimal Setup™.
¹ The site says the last update was 2014, and back then $VIMRUNTIME/defaults.vim wasn't a thing for example(7.4.2111).