The thing is, people use only about a 10th of their brains. Things like ESP, precognition, etc. are like one's appendix, not used much , if at all, by most. At one time, probably many people had these abilities, but once man stopped being rather " primative ", stopped using these traits. Those, who still had them, became " wise ones ", shammans, etc. Now, most people, who claim to have psychic abilities , are FRAUDS . Use it or lose it, as the saying goes. :-)
I completely agree. It is not something you want to cash in on, nor go public with. True ability is silent ;)