If you demand privacy, there will never be any trust. If you EARN trust, the privacy may, one day, return.
Agreed. I'll add that if you do the work, and if you actually do love your BS, then privacy (from them) is honestly not something you'll need or desire anyway. At least, not in regard to the relationship or things that could threaten it.
If I am having a rough bowel movement in the bathroom, I feel it's reasonable to ask for privacy from my spouse so that I can stink up the bathroom with a little dignity left intact. That kind of privacy doesn't threaten the marriage and it doesn't shut my spouse out of my life or my thoughts. It is asking for privacy out of respect, not out of fear or deception.
If my wife asked to borrow my phone and I replied, "Uh, no, I'm not comfortable with you seeing my private emails and conversations" then that's a problem. There shouldn't be anything so private going on in my life that my wife cannot see it or ask about it.
To be honest, questions such as, "Will I ever win a fight again? Will I be blamed forever? Will I ever be trusted again?' and so on, are still VERY self-focused/non-empathetic patterns of thinking. In the WS's mind, it may seem as if you are simply, "Protecting your own best interests", but well, that's the point. The affair was a complete obliteration of your spouse's best interests while the WS got their "needs" fulfilled. I often use the example of someone punching you in the face and then asking you to feel sorry for them because they hurt their hand while punching you. I'm not saying it's not okay for them to want to take care of their own injuries. But it IS unreasonable, and disrespectful, to ask your victim to worry about the consequences you brought upon yourself, and which are, quite frankly, deserved.
The loss of trust is not a punishment, it is a consequence. When your brain tries to tell you otherwise... correct it.
If you need privacy from your spouse, ask yourself why they can't see whatever it is that is worrying you, and then ask yourself why this exists in your life, and then remove it.