Netflix pays for Netfix's bandwith, I pay for my ISPs bandwith, and w/o Net Neutrality, the ISP charges Netflix again for transport across the ISPs network.

What are they charging the first time for that isn't "transport across the ISPs network"?

Without a rule saying you can't charge for the same thing twice, there's only law, convention, or competition to prevent it from happening. Since the ISP industry is famously uncompetitive, we're left with law and convention. Now, just convention.

Netflix pays for bandwidth on their end, and I pay for it on mine.

And everyone in the middle pays for it. Again, ISPs are forced to upgrade to deal with Netflix traffic. Saying that isn't the case and the market sets the price is willfully ignorant. There's a reason there are no more small ISPs available in the urban areas where they used to be plentiful (in the late 90s to early 2000s), but even if you keep pretending it's a series of tubes, someone has to pay for that capacity who isn't sharing the revenue.

If they have to upgrade, then the bandwidth they sold to end customers wasn't there was it? Small ISPs have been pushed out often by legal manoeuvres by large mega-ISPs.