How do you feel about grandmothers who whisper fears and illnesses? M…

How do you feel about grandmothers who whisper fears and illnesses? My mom went with her mother-in-law to one of them, she read a prayer and said that my child's fear is strong, his head hurts and his stomach aches. Therefore, he sleeps poorly at night. And gave instructions on what needs to be done for this. I am in shock, I can't say anything, they didn't even ask me for my opinion. And somehow I don't believe in all of it, especially some rituals still being conducted like that. Do you believe in such things?