the hypothetical here is that Comca$t is going to artificially throttle Netflix and give you mandatory free (paid) access to their own streaming platform.
all a WISP has to do to compete is offer more bandwidth than the throttle allows with no bandwidth shaping at a competitive price.
If all that the internet was was streaming video, sure. It's not, though.
The WISP also has to be resilient against Comcast removing the cap at a lower price (at least until the WISP folds). And against being bought out by Comcast. And against Comcast's lawyers and lobbyists (the wireless spectrum being a government controlled and finite resource).
you make it sound like competing with comcast is impossible. it might be difficult, yes, but if you have less-than-shit policies in your state/muni lots of options tend to pop up.
i live in Utah, and i have several ISP options pretty much anywhere along the Wasatch Front, including fiber and wireless. i can't speak for anywhere else, but its not like its impossible.
all a WISP has to do to compete is offer more bandwidth than the throttle allows with no bandwidth shaping at a competitive price.