I for one am of the "life is dhukkha" school, rather than the "life contains dhukkha". While it is true that there are both pleasant and unpleasant experiences in life, the Buddha taught that either choice was unsatisfactory, full of stress, full of suffering, both in the moment and in the end. I think it's part of what he meant when he said his teaching was against the stream. Somehow I don't think it's enough to get the best life we can get. We have to go beyond that and see how it's all a game you can't win. It's all dhukkha.