This one seems to come fairly easy to me. One of the lures in collecting is to have an example of a pure dedicated type or design using the most appropriate materials for the intended use
even though use will never be considered. Micarta (type) has become a signature for handles that are intended to withstand abuse
if ever necessary. A fragile (comparatively) handle on a design dedicated to extraordinary use purposes would seem to run contrary to design parameters. It's the same mental process that causes some blade fanciers to enjoy seeing their favorite model ruthlessly abused to destruction. If the purpose of the creation is visual beauty, synthetic is inappropriate. If the perceived beauty is in the harmony of form, function, balance, and unfailing durability, synthetics can contribute to that goal.
Lately, I've been considering how long contemporary knives may last. I suspect that customs made for collectors (who protect and preserve) of stainless and synthetics, such as Micarta, may survive intact for countless thousands of years. They may become quite a timeless legacy from custom makers.
And the maker of the knife could still be known. This intrigues me for some reason. I would start a thread on the question, but find my subjects of interest have a short half-life.

Any thoughts? Regards, ss.