Why is there no M-x word-wrap?

[Deniz Dogan]

As I understand it, the right way to turn on so called word wrapping in 
Emacs is by doing (setq word-wrap t).  This isn't very user-friendly in 
my opinion.

Why is there no command named `word-wrap' which toggles this mode?  It 
can really throw newbies off telling them to do M-: (setq word-wrap t) 
and if that's not enough, I find it kind of annoying myself.

Deniz