If Holly isn't a troll, she'll be back. She'll regret enormously, in just a few years at most, this decision.
You can't unknow what you know. Holly knows -- or at least, has been given plenty of information -- about the many false teachings of the WTS. Eventually, when she gets her share of hard knocks, or gets tired of hearing the weekly load of bullpucky, she'll remember what she knows.
There exists a picture that's an optical illusion that illustrates this nicely. When you first look at it close up, you see a fuzzy image of an attractive woman from behind sitting at a makeup table with a big mirror in front of her. As you stare at it, you gradually begin to see a huge, grinning skull staring back at you. From then on, you can't look at the picture without seeing the skull.
It's the same with getting to know Jehovah's Witnesses. At first, you see some attractive features. Then you gradually begin to see evidence like a grinning skull. Once you admit to yourself that the "skull" is there, you can't see the attractive things without seeing it. And once they see it, many leave the cult.
AlanF