I would love to talk qualia ... things can also disturb
But I think true art and true poetics are active in a more neutral place ... the place of relations .. taste is dictated by qualia ie - whether you like a thing or not .. but your reaction is based on other more deliberate judgements
.. as to art therapy healing. .. well yes, up to a point .. these things can also make you sick perhaps ... I would love to heal myself through art