Pardon, but I am not following. I never implied every piece of fanart has to be accurate to every detail, and I am fully aware official artwork is not always 100% accurate.
Idk why you are being so highly dismissive of an observation? It's not an opinion or anything, I was noticing something about a design, mentioning "huh! I just learned it's not military standard, so I wonder why does the beret stay red in recolors if not for military standard" and mentioning it's a good detail to note if a person wants to draw fanart of younger Sierra in military standard.
Obviously fanart can be anything Doctor. Many artists like to portray symbolic clothing within standard (military standards, cultural ruleset standards, etc), so I thought it was a cool fun fact to share. 
I don't understand why you are being so contrarian. And I don't understand why this escalated to this point. 