Welcome to the forum! It is nice to see a new user jump in and immediately contribute in an existing thread his point of view.
I agree largely with what you say - Hermes are 1st rate and anything with their name on is 1st rate. Even their suits belong in the upper echelons of the suiting world - their bespoke pieces have amazing quality, and their RTW pieces are pretty much on a par with many highly rated brands / bespoke makers mentioned in this forum. But that is the catch - paying $1K over even a Kiton for a conservative(ish) suit makes little or no sense to me - particularly when you can score similar quality suits by other brands that more often go on big discounts. I understand the concept that an interesting design, style or fit is worth its weight in gold (i.e. Bijan, Tom Ford, and some off the wall Versace, Gucci, Prada etc designs), but I cant get my head around why a person would sink $5K+ into a solid navy Hermes suit rather than sink $4K into some other high end lux brand offering similar. I would understand completely sinking $5K on a runway Versace or Tom Ford suit - particularly if it is very interesting or unique.
Perhaps exclusitivity may be the biggest factor here, with Hermes seen as the Rolls Royce type brand and Tom Ford / Prada / Gucci et al seen as the Ferrari brands. All luxurious, but one more exlusive than the other. My anti Hermes for $5K+ stance could be my flawed thinking however, since I dont consider exclusitivity as an important metric with clothing.
BTW, Gucci, Prada etc are not necessarily worse made than Tom Ford. The difference is Tom Ford has one high end line (as far as I know), while Prada, Gucci etc have their fingers in many pies and hence have some inconsistencies in quality (i.e. one line is $300 for a dress shirt with plastic buttons, another line $800 for a hand made dress shirt with MOP buttons). Most luxury fashion brands "can be" at a very similar well-tailored level as Tom Ford.
You have an excellent POV, and put it very well. Great, well thought out post.