Forgetfulness of the Supreme Lord, Viṣṇu, is human society's real and original disease. So, if one does not treat this ailment but instead shows insincere and shallow concern for the patients, one might give them some momentary relief and pleasure, but ultimately such a course of action cannot cure them permanently. If the patient goes for proper medicine and diet but is instead administered bad medicine and diet, then he is certainly in the jaws of death.
The remnants of food offered to the Supreme Lord, known as prasādam, is the best diet for all patients. And to discuss and hear topics glorifying the Supreme Lord, to see the Lord's Deity form and offer worship to Him, and to completely surrender oneself to the Lord—these constitute the greatest medicine, the panacea. These activities are the only secure path to prosperity, whereas other activities will wreak disaster. The practices of devotional service to the Lord can never cause harm to society; rather, they can only usher in an age of opportunities and benedictions.