Therapist have professional standards that include a graduate degree and 1000's of hours of practice with supervision. Maybe a few bad ones fall through the cracks but I would be willing to bet that due to their standards most therapist are professional and do not give 'dangerous' advice or really any advice at all if they are following their professional standards.
Therapy gone wrong lead to wide scale witch hunts across the U.S. in the 1980's that dwarfed the Salem Witch trials. A huge number of therapists had come to believe the now mostly debunked "recovered memory" theory to construct the idea that there were networks of secret Satanists across the U.S. that needed to be weeded out. Countless lives were destroyed. I've yet to see therapy as a profession come to terms with the damage they did.
"These people are credentialed professionals so I'm sure they're fine" is an extremely dangerous and ahistorical position to take.
