Saisanji you have very nicely said, Yes Prayers does change things
Prayers give power to wise and wicked, we all know that Rawan and demons prayed to Lord Shiva to acquire power which they used against Lord Shree RAM.
Saint Dnyaneshwar backed chappati on his back, had a ride on wall, made it move according to his will, made a buffalo say Verses from Vedas, this is the power of prayers.
Prayers changed Valya to Rishi Valmiky, who became famous by his Ramayan
Allah Malik