It does not "only" benefit you: https://www.eff.org/deeplinks/2014/07/net-neutrality-and-glo...

It makes it harder for other businesses to enter the same market, as their offerings will not be zero-rated without an agreement with T-Mobile.

Any measure that makes it more difficult for companies to complete will ultimately harm consumers in the long run. So the only people this benefits, ultimately, are the incumbent providers, because it makes their market less competitive. Startups, for one, definitely lose: http://avc.com/2014/01/vc-pitches-in-a-year-or-two/