C'mon, you know the answer to that. You've heard it a million times. Whenever anyone is disfellowshipped what does everyone say about that person? They say, "They left the truth" or "they left Jehovah."
Read it again. It's typical Orwellian doublespeak but JWs are so used to it they don't even notice the inherent contradiction.
When someone is disfellowshipped they are expelled from the congregation. But JWs obediently say that the person has "left" the organization.
The action is taken by the congregation elders and obediently followed by everyone in the congregatoin, including family members, even if they do not even know why the person was expelled. The blame is then placed on the one that has been expelled.
Let's review this very important point: They most certainly did NOT leave, they were kicked out! (Obviously an active, deliberate disassociation is a different matter).
So JWs tell everyone that isn't a Witness that their family member "left" them. They "left" the family, the religion ... whatever. They play the victim: poor pitiful me, abandoned by my mother/father/son/daughter/husband/wife/brother/sister ...
Of course the non-JW would automatically feel sorry for them being "abandoned" because they don't understand the real dynamics of what actually happened.
The whole thing just reinforces the learned-helplessness and victim mentality in which all JWs are indoctrinated by WTBTS teachings, practices and policies.
The R&F become enablers in a typical codependent relationship, repeating the rationalizations and excuses invented by the abuser (the WT Leadership) to excuse and justify their abuse.