>>55522836>They absorb joy to increase their psychic powersSounds like nourishment to me. The Pokedex entries for Ralts and Kirlia make it very clear that positive emotions are relative to their personal health. They prefer to be around cheery people and will literally run away and hide if they sense hostility.
Gardevoir is the result of being surrounded by positive emotions and doesn’t deserve to be weighted down by the mentally unwell.