I think a big part of it is that a lot of people stream on their phones. For a lot of those people, their phone is the only computer they have. So quality is less of a concern than availability. I’m all for the Arr stack, personally, but I can see how streaming has more appeal for a lot of folks.
This is the primary reason I stopped consumimg news that doesn’t directly relate to my interests. Eliminating news and advertisement from my life is the most liberating thing I’ve evr done.