It's the same principle as not allowing toll roads to take money from Toyota and then charging Ford cars a higher toll.
My worry is that once you open the door here to government regulation, you aren’t going to get net neutrality. So Hulu might qualify, but I can imagine the FCC starting to allow regulations under pressure from big media companies like “ISP’s will be allowed to throttle or block traffic they believe contains content in violation of copyright law”. And rules like this will then be used by big business to block competition from legitimate start-ups (like a youtube competitor that might have 99% legit content, but also some TV episodes). The goal is noble, but once it gets perverted by both big government and big business there is more risk here than benefit.