Any believer can rebuke a demon, but a formal exorcism is more than a rebuke. For example, it usually involves demanding that the demon identify himself, which is a dangerous thing to do for the novice.
Also, real demons quite frequently will taunt exorcists and quite often know things that people would rather not have revealed. They're not to be trifled with. While some of the special effects in the movie "The Exorcist" were bogus, the scene of the demon taunting "Fr. Damien" with his deceased mother's voice, and laying a guilt trip on him for his treatment of her, was pretty accurate.
‘’Nobody is charged money for an exorcism’’
Of course not — in this day and age.
“Revenue generating scheme”? Nobody is charged money for an exorcism, so that’s nonsense.
I totally agree. You wouldn’t even think of charging. The experience of having the high volume of Divine Love flow through you while doing this work is in of itself greater than any amount of money.