The most fascinating thing I found on the internet this week…

…was this set of guidelines for women Civil War reenactors who reenact military roles. The premise is that you are supposed to be as realistically male as possible so-as to be realistic to the period (1860s in the US, for our international readers).
I’ve only recently started to learn about the phenomenon / subculture / practice of Civil War reenactors, so I really don’t know what to make of stuff like this:

3) Voice: One of the most difficult things to disguise. Try to keep your voice tone low and deep. If that is impossible, try not to speak too often when you do find it necessary to speak. ( NCO’s : Yelling orders in battle doesn’t count because everyone else is yelling and their voices are cracking too!)

or what’s going on here?

2) Discretion: While in the field or in camp, you may face situations that require mature handling. PLEASE use your head and think before you say or do anything that may embarrass your comrades or yourself

or the emphasis on disguise as necessary to save “fellow soldiers from embarassment”?

B) Binder: An absolute must unless you are completely flat chested. Sports brassieres do not give the kind of support or effect that is desirable. One can still detect “unmanly” chest movement and those type brassieres don’t really protect you from pain or your fellow soldiers from possible embarrassment. Imagine that you are in a tactical and a branch snaps you across the chest. Will a “Sports Brassiere” protect the tender areas? The answer is no. Now imagine that you take a “hit” face up and the hospital corps comes to check for a heart beat. Will that Sports Brassiere keep them from finding out your true gender and save both the corps soldiers and yourself from embarrassment? Again, the answer is no.

Anybody on this community familiar with American Civil War reenactors and their traditions / expectations / norms? Is this insane sexism, talking down to women and putting the onus on them to prevent their comerades from “embarassment” by revealing their bodies or gender identities? Or is it empowering for women to be able to have moments of acting and being perceived as completely male in a socially accepted way? I’d love to hear how folks interpret this!
I suppose some could interpret my question here as a privileged person demanding to be educated since I obviously know nothing about this topic, but I’ve not been able to find much information on the internet and I don’t know too many folks who are involved in Civil War reenacting.