I had my ex-brother-in-law who is DFd try to convert me back to the religion because he figured it wouild make him look really good to the family.
I think we have a hard time understanding why DFd people who have been so hurt by the religion want to return, partly because JWs believe that anyone who is DFd is practicing sin and is completely on the side against the religion. In reality, I think most of them still believe. Yes, some are DFd for apostasy, but the majority just fell afoul of the rules.