Simplest way I could describe exposure anxiety -- is like straining your sense of smell via too much exposure.
It'll become more vulnerable with more exposures as it'll feel raw, that would bring potential problems when remain exposed. And remain exposed enough, breathing will be torture even if you're not smelling anything at all unless you stop breathing through the nose. And if you do not rest your nose, you'll start to develop something else that will reach the throat, the lungs... And eventually, anything that is connected.
Until, breathing simply hurts yet you had to in order to 'live'. Then, you just live to cope. Then, you no longer could just live, but survive.
Differences is, one can have a choice to stop breathing through the nose, and it wouldn't just happens to anyone all the time.
Unfiltered sensory input, on the other hand... Isn't a choice, and is happening throughout the lifespan. Then combine other complicated factors...