There are indeed other dimensions such as the unseen realm that influence miniscule events and major events like wars, social unrest, and pandemics

People who don't believe in that are still affected regardless. This doesn't negate that the physical realm is real however its not the only reality

As for my experience in healing clients with Schizophrenia, it is indeed usually of a spiritual root that is seldom discussed in modern science. Ive helped Schizophrenics whom modern medicine has given up on so I can confirm this too from experience