I'd like to have a more detailed discussion; my disinclination to do so up until now is a matter of short-term time constraints more than anything else.

Right, but that's the kind of thing that would enable one to evade a technical discussion (i.e. a semantic stopsign), and hence is an intellectual warning sign. (I don't necessarily think evasion is your actual intent, of course).

I'm highly noise sensitive and this bars me from appreciating very loud music independently of how aesthetically valuable somebody who is not noise-sensitive might find it.

For the most part, at least in my opinion, the relevant musical variable is not absolute loudness measured in decibels, but relative loudness in the context of a piece. (Of course, the more degrees of loudness are used, the wider the range has to be in absolute terms.)

I'll reply futher later.