Simple.

The RJ course is a tool used by those who lack the conviction to dedicate the required amount of work to achieve a desired goal.

Essentially - those who take (pay their own money) for these RJ courses are only in it to get someplace quick, with no regard to trying to gain increased experience in any shape or form.

They are the ones who are just so damn fascinated with flying a plane for a living, that they will do anything and everything possible (dependent on the size of their checkbook) to get into a jet, further eroding the integrity of the profession.

So in the end - CFI.