Praying isn’t white magic 😁. Praying is asking God for help. Sometimes He answers and sometimes He doesn’t (or He does but we can’t see it!). God is a good Father so we keep on asking. Cancer and other diseases are a result of the broken world we’ve all contributed to break in some way.
Perhaps when humans starting to realise that ALL gods and prophets are just manmade, Perhaps then humans can start to see not enemies just another person