Turbulance action plan
I can see a clear action plan here. Only pax with ICAO approved catheters and ankle bags, together with installed stoma apparatus should be allowed to fly.
That will completely remove the need for lavatory visits, and extra seats can be installed on LoCos. Seat belts can then be compulsory throughout the flight for this new cohort of safe pax.
Other than that, there is no solution to rare and unexpected heavy turbulence.
Praying in the aisles is clearly counterproductive and should be banned.
As for the Indonesian pilgrims rejoicing in the video on landing at Soekarno-Hatta, try an Alitalia plane at Leonardo da Vinci for comparision. Is "God is great" or clapping to "Holy Mary, mother of God" preferable?