Actually, what gets me is the fact that,
at the very least, a small proportion of the people that buy into the hokum are quite intelligent; just take a look on almost any high end forum and you'll see that there are a bunch of research scientists, doctors, lawyers and IT professionals raving about one silly tweak or another.
There must be a gullibility gene that I missed out on or something.
My pet theory is that a lot of people just will or can not accept that their senses are not utterly under their full control so they dismiss claims of perceptual bias until it's proven to them first hand in a DBT and becomes irrefutable. Even then, you can still see some of them sliding back into a subjectivist belief system once the memory of the DBT starts to fade. All I can say is that it's no wonder the world is in such a pitiful state.