Which is usually back to back with the thought that in bygone times "the human mind used to be cleaner / healthier / smarter and it was slowly destroyed by modern living"
There's not that much difference between our behavior and that of a chicken fixated on the chalk line in front of it.
The world is too much with us; late and soon, Getting and spending, we lay waste our powers;— Little we see in Nature that is ours; We have given our hearts away, a sordid boon! This Sea that bares her bosom to the moon; The winds that will be howling at all hours, And are up-gathered now like sleeping flowers; For this, for everything, we are out of tune; It moves us not. Great God! I’d rather be A Pagan suckled in a creed outworn; So might I, standing on this pleasant lea, Have glimpses that would make me less forlorn; Have sight of Proteus rising from the sea; Or hear old Triton blow his wreathèd horn.
https://www.poetryfoundation.org/poems/45564/the-world-is-to...
Not to say it's a hallucination, but, to modern standards, if this were publicly funded research, it seems like it would have been a gross violation of ethics or other non-technical criteria. Interested to see how people think of it in later years, e.g., now.
In a sufficiently isolated population, you get the same effect from a sound-making greeting card, or a battery powered light and/or sound toy from a carnival.
And for what it's worth, tomorrow they don't miss whatever “indistinguishable from magic” thing, so no harm done.
// grew up near such areas