Well, that isn't what everyone, including you and I, is talking about.
Is every violent movie about violence? No, but that is what people talk about when they come out. Tarantino movies are famous for being incredibly violent, but when you watch them he holds back much more than many other directors. The violence is alluded to but not shown. This movie is not about assisted suicide but that is what people want to talk about. That doesn't mean that the producers set out to make people talk about it. It seems that they set out to make a good movie, and succeeded. If you check imdb.com the poll today will show that it is easily considered one of the best of the year, but movie people. And obviously all movie fans are not going to be pro-assisted suicide.