Oh ... not true.
Of course actual Crystals / Angels / Wiccan practitioners etc are a small minority. As are the folk pagan Christian veneer people (Holy Wells, Statues, Miracles of Saints, Relics etc).
Then we have all the widely believed pseudo-science. It's rife. I'm not even going to list it all as I'm sure lots of people here believe different bits of it. It's no different to believing in Magic.
Then again, are you considering only a certain demographic today?
Depends how educated he is and hosts.
It's possible some ancients might be sophisticated enough see it in terms then magic?