It’s a loaded question and sure to stoke a lively debate. As someone who has owned literally hundreds of instruments - including some of the rare vintage Fenders you’re talking about - some of them (but not all) are genuinely beautiful instruments.
As a result of scarcity, all original examples are very much in demand. It’s a search for authenticity I guess, and a vintage tone and feel.
Personally I’ve never played a better instrument than the 1966 Jazz Bass I have. I couldn’t imagine anyone, including bespoke builders, able to create something like it, and I’ve owned or played many of the best.
For example, I can’t understand why anyone would bother to collect first editions of books, but there’s a lovey market out there for it.