But Sai baba producting matter out of thin air is not miracle, it's magic. Just like an adult can easily fool a kid, adults (especially people who are seeking...) can be easily fooled by powerful people like Sai baba.

Magic helps people become believers quickly. When they see it with their own eyes, they believe it. There is no harm in believing. As I have said before, there is more benefit than loss. Nobody is perfect. People who do not believe are far from perfect. They have their own beliefts that are not true.