I think the OP is completely overstating or misunderstanding the position people in this form have on saddles. Resulting in an overly broad, inaccurate statement.

There is no slavish focus on 'vintage', which in and of it self is not even a correct term.

The most common position is simple: Saddles are very personal and you need to find what works for you. YMMV

Beyond that many people ride "vintage" saddle because they work for the individual.

all of my saddles are "Vintage" a brooks b-17, a brooks swift and a sella italia turbo.

but not all brooks work for me. Professional....no go, B-17 N imperial (cutout seat) no go (pinched things it shouldn't pinch) but many other people love these.

In many many cases brooks work for people and that is why the get recommended. But they also get recommended with the caveat of fine tuning needed, have to match shape to bottom and have to match saddle to position on the bike (degrees of uprightness)

All of this is about function and comfort and little is about vintage