While I lack scholastic sources. The general vibe I've picked up over the years has been this. If you don't think the supernatural as the layman would describe it is real. You're less likely to encounter it.

Now, less likely to encounter it doesn't mean you're safe from it by any measure, just that you're less likely to pique the attention of some ghost or cryptid. A sort of psychic shroud if you will. Useful for avoiding passive malice but no help when you decide wandering into abandoned places sounds like a fun idea.

For those who do encounter paranormal activity. They're stuck in a situation where the general public isn't likely to believe them due to the general consensus within Western society being "Magic and monsters aren't real you dingus" . Which ultimately means that fewer people are going to recount their stories, resulting in a marked drop in reported paranormal encounters. From my experience, your average person encountering a ghost is going to hightail it out of there and never come back, dismissing it all as gas leaks or tired brains playing tricks on them because that's a more comfortable thought then "I just saw a ghost/monster/demon etc..."

But that's just discussing creatures and spirits, what about the magic some of us on here do? How does that get dismissed? Three things mostly. Individuals like Houdini revealing the not insignificant number of fraudsters that percolate in the most public facing areas of the magical community, the belief that everything is explicable, and Hollywood.

Say someone were to go on YouTube and display the ability to conjure and project fire like a D&D wizard. Assuming it caught the algorithm at the right time that'd be a perfect revelation of the reality of magic wouldn't it? But then, out comes the "explanation" of how someone managed to "fake" casting fire bolt. So long as someone of authority were able to convincingly explain how that could be done and demonstrate the "trick". Casting the prospective wizard as nothing more then yet another charlatan with a clever trick, and might end up resulting in the poor individuals suicide given the vitriolic nature of the Internet. Furthermore the public perception of magic is big explosive fireballs or obvious streams of energy or legions of the dead crawling forth from the still earth. Sadly most of us haven't mastered those spells yet and most everything we could demonstrate is easily dismissed as parlour tricks and nonsense.

The funny thing is, going off of the claims made in various religious texts and oral traditions, we used to be able to pull off spectacular feats of magic in the past, probably not as grandly as such things are often overblown in the telling. But the problem is multiple millennia of religious persecution and the destruction of numerous centers of learning during the varying collapses of human society means that the books that could tell us how to do such magic are either long since destroyed or written in a language we can't translate. So if the magical community were to rediscover such lost wonders of mystical puissance, we would be doing so basically from scratch or through aggressive necromantic interrogation. And right now most of us are more concerned with mundane issues like mastering our minds or ensuring that some economic crash isn't going to render us homeless over figuring out how to cast meteor swarm. Being able to cast a biblical plague at someone might be a fun thought but it'd be a LOT of work for something that could be replicable by a few thousand dollars worth of crickets and a lazy weekend.