Agree, I may enjoy looking at the form of a sculpture, or be drawn into an Edward Hopper painting, but would not be necessarily entertained by it. I guess it's gonna all hinge on everyone's definitions of what constitutes "entertainment." You could broaden the definition to say anything you observe is to some degree briefly entertaining, a sunrise, thunderstorm, the moon, the Milky Way, etc. etc.
Yeah, in a way, even the most boring stuff I can imagine is at least a tad more entertaining to watch than nothing.