What if 210 said was true?
Imagine, that all this time, Vertin tries to deny that she is the victim of loneliness , that one day, her companions would stay and wouldn't be reversed, that one day, the storm would stop and she would finally have lasting friends.
Maybe can add that Vertin feels guilty but won't admit that she had tried to distance herself from her friends, but, of course, failed.
She tries to reason that she doesn't want to endanger them like last time, the cost being the lives of her friends during her youth, or simply doesn't want false hope and already in-depth friendship, so that if her friends got reversed, the emotional impact wouldn't last long on her.
Doesn't help that Foundation already put barriers around Vertin to not invest too much emotion on people when recording time. So if she did felt grievances, it would be her own fault.
Even going her way to experiment with her suitcase without informing the Foundation beforehand, the sole purpose of saving arcanists she met, or even salvaging trinkets of her friends who later became the victim of the Storm. (cough cough Schneider feather dress)
The thought of her suffering from loneliness lingering on the back of her mind, yet she pushes it away, justifying that after all of it ends, she would never be lonely again, just for 37 to unknowingly confirm that, despite Vertin's efforts, she would forever live with the dull feeling in her heart. Reality sinks in like guillotines on her neck.
Just like how 210 said that axis y and axis x would change (heavily implied that axis y and axis x are people who can be reversed) but 0 would be unchanging. Vertin would always be an observer, a bystander, watching her friends dissolved into puddles of rain. This was her fate. To be immune to the Storm.