That's what CDNs are for. Which, as the article shows, is how Netflix delivers video to subscribers of every other major ISP. Why is it they can somehow route all that traffic to customer houses but Comcast can't?
Take "last mile" literally and divide the US in a big grid of 1x1 mile squares.
If Netflix was able to dispatch its traffic up to each of these squares, there wouldn't be any problem. but there wouldn't be any Netflix either :)
That's not how a CDN works.
Look at the diagram in the article, between the fourth and fifth paragraphs. Every other ISP uses transit networks to distribute Netflix traffic (like all other traffic) to its subscribers. Netflix puts its content on CDNs that are conveniently located to make the transit networks' job easier, by making "netflix.com" endpoints closer to large populations of subscribers. Somehow all the other ISPs manage to "route traffic to customer houses" using that arrangement. Why does Comcast have to be different?
In other words it is acting like a monopolist or a shrewd business.