I agree with the premise of the OP.
The ONLY reason shunning works with some individuals who are aware of TTATT, is the emotional blackmail. The pain of losing all your family, is very real. In my case, the shunning only made me more disgusted with the cult, and my family members who shun me. Same as you.
And the pain is there. Some folks on the forum have said they moved on, and very happy with no family. That is hard to wrap my head around (though I believe those individuals - key word "INDIVIDUALS" - their feelings are just as valid as mine), because the loss of my family, and the ability to visit what I call "down home" (the family home in the country), still hurts.
I'm glad to see you posting, and venting and helping others! It's good to see you're still in fighting form, and makes me feel very "blue" ,,,,,, you know, my fav. colour is indigo! Keep on keepin' on, bro!
xxx