I would like to submit a proposal to the membership

[Nathan]

Steve may be an engineer but I'm a writer so language is the tool of my trade.

The precisely correct word to use to describe adherence to long-standing traditions is not 'iconic', but 'traditional'.

Let's take a look at their definitions from Oxford online.

Traditional: adjective
existing in or as part of a tradition; long-established.
"the traditional festivities of the church year"
synonyms: long-established, customary, time-honored, established, classic, accustomed, standard, regular, normal, conventional, usual, orthodox, habitual, set, fixed, routine, ritual; More
produced, done, or used in accordance with tradition.
"a traditional fish soup"

Iconic: adjective
1Relating to or of the nature of an icon:
he became an iconic figure for directors around the world
MORE EXAMPLE SENTENCES
2(Of a classical Greek statue) depicting a victorious athlete in a conventional style.

The word traditional exists to describe precisely what we are talking about, a long established, orthodox way of doing things that is passed down from generation to generation.
Iconic is sometimes used as a hyperbolic metaphor to describe quintessential examples of things but this is not a precise term when compared to the accurate term, "traditional".

What traditional is not:

Something from a bygone era, out-moded, vintage, retro, over.

Traditional weddings still exist, traditional music still exists, traditional customs still exist.

So what is the problem with using the accurate language to describe the actual thing?

Is it that people don't want to be told their unorthodox choices are non-traditional?
Is it because some people don't like that traditional attire gets too much bandwidth on this website?

This seems to be much more a question of forum politics than an honest attempt to find more accurate language to reflect the various categories on this website.