This only applies to things that are different forms of actual immaterial/more abstract than physical. As they have more specific mechanics and levels going for them.
You seem to have critically, and probably purposefully, missed the main factor of my argument. An external force that scatters her is not the same as her scattering herself.
If she was to activate her semblance, but then have all her molecules blown away by one of Mori Jin's wind kicks, there is no evidence to suggest she'd be able to reform from that. As that is now an external force acting on her molecules and further separating them. Rather than her own ability doing that job.
Oh and btw, here is an instance where
Ruby is kicked out of her semblance by a kick. (2:41)
Should be noted that Aura users only even have NPI with preparation according to
the profile. And it has nothing to do with something like Ruby's ability. It seems completely conditional, even.