While you'll certainly find examples of people that meet your description, the counterexamples are probably even more, and much more diverse than you can imagine, at least among sophisticated people. Speaking for myself (alas, very far from being a rich guy), I can tell you that the last thing I need is prestige through watches. That might (and should) come from professional accomplishments, it would just look odd to me if it came from a hobby. In fact, as I love collecting Pateks, many of the people in my daily circles (both the 'mates' and the 'rivals' of your scientific explanation) barely know what a Patek is! ;-) Cheers.