I see what you are saying but Its not always that case for the general population. While we do have internet access, it goes on and off just like that. It happens sometimes in wi fi hotspots as well. We do have enough money to buy games and pay for internet but technology itself is imperfect (ie: Simcity's and Diablo 3's Launch as well as internet going on and off in general). Sadly, the U.S dosen't have the best infanstructure in the world; rural areas may not have the best internet infanstructure.
If your internet isn't very good now a days odds are your not buying games either, or paying for memberships. So there isn't a point to catering to them because they don't have as much spare money to spend on video games.
Besides, you will never know if a hurricane or a tornado destroys your internet acess. I remember while I was vacationing in long island, a storm hit the area and disrupted the internet. Random stuff happens you know and we deal with it.
Despite the tech issues, I did find a way aound it. I recieved a ipad as a surprise gift and it can play multiplayer games. I take it with me to college campus and use the Internet there to play multiplayer. I am paying for it's internet via my tuition so it makes more sense for me to play multiplayer over there than at home. There internet connection is way better than ours