All good programs should always offer a variety of means to accomplish a task. This way, the end user can select the method that feels most comfortable to them.

I like the flexibility of using either the [ foo "bar" ] or [ bar ] syntax. Anyone who feels more comfortable with [ foo "bar" ] can use it. Others who prefer fewer keystrokes can use [ bar ] and it will work the same way.

TSABMTOWTDI - there should always be more than one way to do it.