Categorizing music - Is it really necessary?

[Keyser Soze]

Style is a tool to be used.. and important to recognize, artists can get trapped in a style, so it is important for an artist to understand what the general impression their "style" gives and make sure it still integrates with the messages they're trying to convey.

I don't think style should be faked though, its easy to recognize when a band has been manufactured. Also trying to appease a musical style with a style limits creativity and appeals to the lowest common denominator of fan. So if we are talking about being commercially acceptable without regard to anything else, then I would say you would be correct but artistically i think thats a contrived way to approach art.