Actually it depends on what period that you're talking about.
In the TX Revolution era and even earlier in New Orleans & the Deep South, Bowie knives were fighting knives and DEFINITELY not "fashion accessories" until revolvers became the norm.
(During the flintlock period, MOST militiamen depended on their knife as a WEAPON.)
By TWBTS, Bowie knives were unnecessary & the prime reason that so many WBTS-era Bowies are still around today is that they were "sent home" & kept as "keepsakes".
(There are a LOT of "fancy" CSA dress uniforms still around for the same reason. = They were not NEEDED for combat & were "sent home, to be put away".)
For example, the ONLY known original CS Marine enlisted uniform still belongs to the SGT's family in Brunswick County, VA. - It was worn exactly TWICE between 1861-65, as it was simply too costly & ornate for daily wear. = Once to a party in Richmond in February 1862 and to the man's wedding in early 1863.
(In the late 1940s, it was found "packed away & forgotten" in a trunk in the attic of the CSA veteran's home, along with his CSMC hat, NCO sword, holster, belt, frog and other keepsakes of his Marine service.)
yours, satx