I agree that the Church is more of a battlefield hospital for the soul than a mere piety society. Its seven powerful treatments can patch up the sickest of souls, but the most anabolic of all is Holy Communion, which is safe to receive on a daily basis, heals all ills and causes limitless growth. The only absolute contraindication is if the Divine life in your soul has arrested. A resuscitative Confession can fix that easily enough.
You don’t need to understand how it works, any more than an infant understands how imbibing his mother’s milk makes him thrive. It just works.