According to this article exorcism still receives legal protection in US:
The Texas Supreme Court on Friday threw out a jury award over injuries a 17-year-old girl suffered in an exorcism conducted by members of her old church, ruling that the case unconstitutionally entangled the court in religious matters.
This also seems to happen in UK, according to The Guardian:
Exorcisms are a booming industry in the UK, partly driven by immigrant communities and Pentecostal churches, according to a report from a Christian thinktank.
However, the vast majority of people being exorcised have mental health problems that require psychiatric assistance, says the report, published on Wednesday by Theos.
This seems rather strange in highly developed countries where psychiatry might be more appropriate in such cases.
Question: Why is exorcism still allowed (legal) in highly developed countries?
As a side note, Vatican seems to be an important advocate for performing exorcism.