Because 10 years from now when there is another administration that you don't agree with and they decide to impose something like fairness rule, impose content decency restrictions, dictate which sites may be accessed from the U.S or any one of a dozen other awful things, you'll know that this week the foundation was laid for that authority.
I am in favor of the result, but this is a Faustian bargain. Broadband providers brought it on themselves by not getting their act together enough to create standards of service and instead were trying to milk the cash cow as much and as quickly as possible.