Once again, it is the user who requested that data from Netflix. The user pays the ISP. The ISP is already immensely profitable. Because of these things, the ISP has no need or ethical right to demand more from the user or from Netflix for providing a service the ISP already promised and the user already purchased.
The ISP doesn't promise to make every website / service on the internet as fast as possible. It's up to every service to make themselves fast by using CDNs. In the case of Netflix, they have become big enough where they now want to be their own CDN.
The ISP sells "Internet" access, so it's reasonable to expect them to meet customer demand at common Internet peering points, right up to the edge of their net profits plus a reasonable return for investors.
