I almost think the opposite. Indie music doesn't have to pass through a record label executive that basically will only produce what he thinks a mass audience will eat up. Therefore, the band can actually make the music they want to make, and not have to "dumb it down" in order to capture the mass audience. Which, admittedly, leads to some very bad bands, but it can also inspire more creativity than was ever possible under big labels.
For example, a big label in the 70's or 80's would never produce some of the bands today that have very different sounds from what was popular then, such as Animal Collective, or TV on the radio, because a big part of the audience would just reject it completley because it was so different from what they are used to. However, these are some of the more creative and great bands of today.
So say a new band with a strange new sound that was unlike anything thats around today came about. They could produce their record on an independent label, and get there music out there without having to pass through the "mass audience filter." Many people would reject them, because they were so different, but many people would really appreciate them, and their fanbase would grow, and they could make really great music, that without that indie label, may have never been produced at all.