That depends on your definition of hocus pocus and supernatural. Those in the trade know that this kind of stuff is anything but supernatural. In fact, it's all very much natural. Just there are bits and pieces that we don't know yet how they work. Doesn't mean they don't work though. And since we lack understanding, sometimes it's hard to gauge how to effectively work something and if it works at all.
If you ask each tarot reader or psychic what exactly makes it work, you will get a different explanation every time. Some believe that it is in fact divine power at work, others believe that it is our own consciousness that is trying to talk to us, and there are all kinds of explanations inbetween.
If you ask each witch you encounter what magic is, you will get the same result. But I doubt any of them will say it's 'supernatural' in the traditional Holidwood sense.