GromitSK:
To jump to a conclusion either way, particularly about a stranger is likely to provoke an unconstructive reaction.
You make it sound as though the two arguments of 'supernatural cause' versus 'natural cause' have equal merits. They don't. Extraordinary claims require extraordinary evidence. There is in fact no premise on which to base a conclusion that such experiences are actually 'supernatural'.
And it is potentially damaging to indulge people in fantasies about ghosts and demons where there may be a legitimate health risk.
Do you really imagine it is better to protect someone's feelings at the expense of leaving a serious medical condition undiagnosed??