Some people debate if man has landed on the moon. Is it enough to not be able to guarantee that he really has done it? The fact is that a few people, using selected audio formats and selected recordings prefer vintage because it matches the way they listen to life music. Great for them.
Many - as far as I know, most audiophiles like to change. They know that it is hard to find buyers for small or unknown brands. When you pay an higher price for a manufacturer that does a proper job creating a credible distribution, service and advertisement you are getting some kind of insurance. There are no free lunches in the high-end, even those paid by friendly dealers.
Products can have temporary success based on advertising and promotion, but in the long term a product must have quality to be successful.
Bias is a strong part of the high-end. If we managed to suppress all our biases we would probably be looking for another hobby. People often praise the importance of friendship in this hobby. IMHO it is one the best sources of positive bias.