Offset Pipe Bending Opinion

It seems almost impossible that for 60 years electricians have been given the wrong information for bending offsets in conduit. The multiplying factors are not correct and using the cosecant of an angle as a multiplier to find the distance between bends is incorrect. Someone has been pulling the shade down on electricians and no one bothered to check the information for over 60 years, that I know of, and I have read a lot of information on this. I am convinced that someone years ago was so desperate to sell EMT and benders that they over-simplified the bending math to convince users that bending offsets is simple, easy and fast. Or someone has been fooling the labor market by deliberately publishing the wrong information to make pipe bending more labor intensive. Anyway, the bottom line is my research into the mathematics of bending offsets has revealed an almost flagrant ignorance of the facts. I shudder to think of the erroneous offset tables now being so widely accepted that they are now attached to hand bender handles, and the person responsible is bragging about this in one of his books that has sold over two million copies.
The article at http://www.electrician.com/electa1/offset.html
explains my findings.