It's not "simply to avoid judgement". You're hand-waving "judgement" away as something meaningless. It can and does cause people to treat you poorly.
An example: If you work in support for anything like the general public, you either don't swear or keep it to a minimum. You may swear like a trooper in your private life, but it's not worth the social friction to "be open to everyone" in your support job.
Basically you're taking the argument to a purely theoretical level, where everyone needs to buy in for it to work, and that's just not feasible.
And in any case, whether or not we're open with each other is an entirely different argument as to whether we're open with an authoritative entity that doesn't always act in the best interests of the general public.
Being open doesn't work if there's an oppressive government suppressing those who disagree with it.
You soon won't have the choice whether you keep things private or not. Everything is going to become public at one point or another. Never underestimate technology.
An example: If you work in support for anything like the general public, you either don't swear or keep it to a minimum. You may swear like a trooper in your private life, but it's not worth the social friction to "be open to everyone" in your support job.
Basically you're taking the argument to a purely theoretical level, where everyone needs to buy in for it to work, and that's just not feasible.
And in any case, whether or not we're open with each other is an entirely different argument as to whether we're open with an authoritative entity that doesn't always act in the best interests of the general public.