According to SN/SA suttas, the Buddha teaches that one knows and sees altogether ‘seven things’ as they really are. One of the seven things that one has to know and see as they really are is the flavour (assada) of the five aggregates/sense spheres. This is about the ease-and-joy (sukkha-somanassa) that arises conditioned by the five aggregates. So, it seems the Buddha recognises that there is also positive outlook on life.
Cf.: What does it mean "to see things as they really are"? - #14 by thomaslaw