1) Only if he claimed it was a technically better amp.
2) Patek Phillipe watches cost...
3) I don't have a problem with someone paying stupid money for a SET...
4) We all only get one ride, and it's a short one....
I'll number your points to make reply easier.
1) You've hit on an interesting thing. Audio is one of the few handful of hobbies where someone can make an idiotic claim and people actually buy in to it. For instance, if someone installs low-profile tires and carbon ceramic brakes on a Beetle, tripled the price, and then claimed it was a somehow a 'better' car for it (in magical mysterious ways undefined), they'd be ridiculed. But if someone builds an expensive 8 watt tube SET with magic wire and wonderful caps, prices it through the roof, and then claims it 'sounds' better than an AHB-2, you can be sure that some 'reviewer' and his wife will agree that it is better, and true believers will lay down dollars for it.
2) Both watches will tell time accurately, although you might have to adjust the Swiss mechanical watch every couple of days, compensating a for a few minutes of time. And most recognize an intrinsic artistic, aesthetic, and miniature engineering value inherent in a hand made Swiss watch. In audio, maybe something analogous to what Nagra is doing. On the other hand, an 8 watt SET is not and will never be in the same design or engineering class; although it could have nice fit and finish-- it will always be an 8 watt SET. Alternately, if were talking about, say, Bob Carver's hand made Silver Seven 900 tube amplifier, you could certainly and, I think, legitimately equate that to a hand made Swiss watch. And probably make the case that, for toobs, it is technically better to anything else that comes in a bottle.
One thing about the watch: ask your kid whether he'd rather inherit your hand made Swiss watch, or your hand made 8 watt tube SET, and you'll get an immediate idea of intrinsic worth and value!
3) Me either. I just kind of marvel at the thinking that goes behind it.
4) Apart from being short, which is true, some think otherwise. Who knows how it will be? Back from the Intermediate Stage bardo, if I have to glow, I want to be born into the Silver Seven 900 group [eternal salvation], and not the 8 watt SET crowd [eternal damnation].