I think your argument has giant holes. You're not sure that Apple, the world's most valuable company, one of the most popular brands on earth, knows how to market a product? You don't think they've reached the point where they can command 10K plus products? What do they have to do first? How much more brand equity do they need?
You can try and argue that it's the same problem hyundai or volkswagen have when they've tried to enter the luxury car market - and it's that people associate those brands with value and not luxury. That's also why Mercedes does NOT sell certain vehicles in the United states - brand equity. Here, they are a luxury brand and a luxury brand ONLY. In Europe, they make taxis and vans.
Apple doesn't have that problem. They make really nice things that are, in effect, kind of like luxury products. Their computers are more expensive. Their phones are expensive. Their tablets are expensive. It isn't a stretch to imagine the watch will be expensive.
$350 is cheap for a watch. Almost laughably cheap. $1000 for the stainless makes sense. 10K plus for a gold watch is pretty normal for a gold watch. They don't have to DO anything to command that price. It reminds me of a watch company like Bell and Ross, a relatively young brand. You can buy a 4k BR01. You can also buy a 125K tourbillon. They didn't have to wait until they were 125 years old like Patek Phillipe. They just had to build it. Whether or not you buy it is up to style. That's all it is. If someone can afford it, wants an apple watch, and likes gold, they'll buy one. Apple has the brand equity to command it.