And of course, reading further - it turns out you have absolutely no idea what the rules actually prohibit and about 90% of what you think they prohibit aren't in them - and your view is therefore based on a flagrant strawman.
This isn't about price differentiation - it's about what it means to have an internet service: it means I paid for access to the internet, not only to those internet companies that my ISP isn't competing with.

And no, there were flagrant and rife abuses of exactly what these rules prohibit RECENTLY which the FTC could not touch because it's under FCC jurisdiction. The entire Netflix/Comcast debacle is a prime example.

How better for a cable-tv/internet provider to defeat competition from an upstart with a fantastically better television service - than to slow that service down to unusable speeds. That way they don't have to improve their own crappy service.