Art as Therapy - Please analyze my annoyance

A few weeks ago I became aware of a project by philosopher Alain de Botton and curator John Armstrong called Art as Therapy. Little did I know that I would be experiencing the part that takes place in AGO, Art Gallery of Ontario in Toronto (besides the Rijksmuseum in Amsterdam and the National Gallery Victoria in Melbourne) so soon. The themes are Politics, Love, Sex, Money and Nature. Different works of the collection are put together on different floors to address these themes. Here's a link to an introductory video

“Art,” according to the authors, “has a powerfully therapeutic effect. It can variously help to inspire, console, redeem, guide, comfort, expand and reawaken us.”

Why am I so annoyed by so much guidance ????