As Fernando right says, there's a place for specific instruments - violin, viola (don't forget the violas!), cello and double bass for the string section of an orchestra or ensemble, for example.
And in the case of our band, we have vocals, baritone guitar, bass and drums. It's a different setup by nature - the drums are spread over a wide frequency range, the bass obviously takes care of the punchiness and fatness in the low end, but there's still a role for a baritone guitar to fill up the low mids with aggressive grind.
Liking or disliking it is a subjective matter, and has no influence on whether there is or isn't a place for low tuned guitars ;)
Roo