It's superpowers lmao. It's just supposed to be a stun effect, not a master effect. It's practically magic, I'm not sure why it's so hard for people to wrap their heads around this. It's not like Vicky is the only person in all of fiction with a power like hers, yet I only here talks about long term effects with her, probably because the fandom's woobification of Amy.
It's like asking why doesn't Superman destroy the Earth when he reaches super fast speeds. It's magic, you're not supposed to think about it. You're only thinking about it because of Amy's woobification. (Some comics have explanations as to why Superman doesn't destroy the Earth, but my point stands).
I've covered this before, but basically…
Okay, the first thing you're overlooking is that you keep saying "
effect", but you seem to be trying to use it to mean "
affect". "Affect" is
how it does something, but "effect" is the end result of
what it does.
Like in
A Certain Scientific Railgun, there are lots of people whose powers include a Mind Reading
effect. However, the
affect that causes this ability can vary — it's usually an electricity-based power, but there are at least two examples where it's a water-based power.
PRT classifications are
engagement guidelines, so they deal with the Outcome, not the Cause. How Glory Girl's power
works is irrelevant, only what it
does as a result.
The second thing is… basic psychology. Operand Conditioning — like Pavlov's dog. The fact that her aura affects people when she is present, causes them to associate the resulting sensation with her presence. Conditioning… and the same basic principle behind various addictions. Eliminating that impact means basically mind-controlling people to somehow ignore the effects of her Aura when they are not under it, even when reviewing memories of
being under it.
In other words:
the only way for her aura not to be causing a Master Effect is for her to instead be causing a different Master Effect to cancel it out.
By contrast, Superman could just be using his telekinesis to form a
Bussemann Biplane–type effect around him, to cancel out the sonic boom and prevent damage in a way that lets
everything except him continue to line up with regular science.