Haiku is a very short form of poetry. Yet, it conveys a lot, thanks to techniques developed over the years. One technique is the season words, and another is juxtaposition ("cutting" included).
As an painter, I find that the latter is most important, for the invisible poetic content that emerges from the visible elements on canvas is the heart of painting. A painting with this poetic content is what makes the artwork strong and everlasting. I think the same could be said for other forms of visual art, and possibly to music, literature, and what not.