It does if single or double quotes are used, right? Which would be necessary (or preferred to multiple backslashes) quite often.
Quotes live on a different level of abstraction.
With quotes the program will receive a single argument -n␣o␣p␣e instead of multiple ones -n, o, p, e. At least it works on the machine here:
]$ echo "-n o p e"
-n o p e
]$ /bin/echo "-n o p e"
-n o p e