Eric Roberts is on Celebrity Rehab — I’m Confused

There’s only one reason that real actors join reality shows.  Their work has dried up.  I’m fully aware that many celebrities need help, but trust me — they wouldn’t join Celebrity Rehab if they had more lucrative offers in front of the camera.  They’d get help in private, and continue their acting careers in public.  So that brings me to Eric Roberts, who many know as Julia Roberts’ brother and Emma Roberts’ father.  The reason I’m confused about his appearance, is that I thought he was still a working actor.  It’s only been two years since he appeared in the blockbuster film, The Dark Knight, and his part in the film was pretty substantial.  Is it possible that his career took such a turn for the worst in just two short years?  I don’t get it.  Yes, there is the argument that he wants to do this show to help people, but I’m a pretty cynical Dishmaster, and I just don’t buy it.