The cambridge dictionary explains the spiritual as, "Relating to deep feelings and beliefs, especially religious beliefs".
It is totally agreed that every country has its own culture, but we have to talk and follow here about Indians and we cannot follow other countries. If we have some set back in our daily life, it is normal to think about what mistake we have done earlier to face such problem. Immediately we run to doctors or specialists for remedy. Individual citizen may have some different mind about religion, God etc. but universally as Indian we think so, that is to seek Divine help. Nobody can deny a supreme power over us though whatever we have studied or whoever we are. A learned, wise, talented Kings like Ravana and Hiranyakshan got boons from God (some supreme power-if God is not acceptable) by forgetting specific points on their death. We are whoever may be but following some tradition in our house according our house follow-up rather than anything.
Normally in Chennai we get rain during December and January. Our people used to comment once the cricket match planned in Chennai stadium the cricket fans to pray God for stopping rain during the match days. but since recent years it is very tremendous rainfall and many houses filled in rain water, many people lost their certificates, values and running for food. Moreover in recent rains Chennai suffering a lot, in spite of our CM though declared many arrangements.
Similar to that the seeking help from God or supreme power through our prayers especially through collective prayers for rescue of the Universe from such disasters.