I've never heard of it, and if she's already been to three inpatient programs, she has learned the tools necessary for sobriety. IMO, it all boils down to the fact that she doesn't truly want to quit drinking. When a person reaches their bottom, they are willing to do whatever is necessary to recover and live a sober life. If it was just a matter of watching a DVD or reading a book, there would be no need for rehabs, AA, Smart Recovery, SR, or any of the other programs out there.
I agree with your line of thinking that she's just trying to take the easy way out and hoping that will be enough for you to trust that she's working hard on her recovery.