I used scare quotes as it seems misguided to attempt to analyze such diverse points of human experience with the metric of "pleasure" alone.
Art and similar activities carry much more meaning and significance than candy, thus have they have a larger effect on an individual's life and broader society. Surprisingly, this obvious point was not mentioned in the article.
Of course, we may not yet have instruments that can accurately assess these more nuanced differences.
> there is a large swathe of population that doesn't particularly care about art
Ah yes... "Art" is a tricky term. I think things such as movies, music, books, etc are also relevant here, and are considered forms of art. I might define art as "creatively expressing ideas through an imprecise medium".
Of course, as they say, anything can be art. My definition fits that -- all expression, even mathematic and scientific, contain some imprecision.