I guess balance comes into play here too. A superbly designed, crafted and finished case, a beautifully structured and clean dial, fantastically sharp and fitting hands, a luxurious crocodile strap, they just don't go with a relatively cheap quartz movement, how accurate that may be. The movement must also be something special, well designed and constructed, nicely finished, being an integral part of the whole watch. I guess the mismatch will not sell, buyers will not do it. So either you have quite a good looking watch with a quartz movement for a reasonable price, or you have about the best you can get for a much higher price, and that watch has a mechanical movement.
But this kind of reasoning has been proven wrong a few decades ago. In those days, the luxury watches had a gold or platinum case. Steel was for the ordinary middle-of-the-road watches, the good tool watches. Until Audermars Piguet came with the Royal Oak, a luxury steel watch with a fitting price tag. It was a huge success and now most companies have top steel cased watches. Patek Philippe has a very very expensive steel chronograph. As long as it sells the company is right, the concept is sane. But I don't see this happen with quartz movements, movements are the heart of the watch after all.
Kind regards,
Paul