The closest thing I have been to the ISS is living on a small phishing boat for a week. I could warrantee you EVERY SINGLE PERSON THERE WANTS PRIVACY. And it is crazy if you do not respect it, this people can throw you out of the boat, you could not imagine how difficult it is to live in a small space with other people for a long time.
You say nobody on the ISS wants privacy, based on what? Have you asked them, I bet you do not. You have just thought about it based on your own prejudices on the comfort of your home.
I have lived in China with so many people everywhere, after that living on Norway or Alaska or Argentina feels so great. Vast Spaces just for you.
In my opinion it is just the animal inside with her territory, as simple as that, gorillas have it, lions have it, and we have it as animals.
When they remove privacy from us they are removing our personal territory: We are not free anymore, we are in someone else territory(the country masters, or the big companies).
Without Privacy we can be judged at any time for any reason. They are observing us and they could hunt us like prey when we are weaker, they can take advantage of our vices in order to profit, they could blackmail us.
Remember Bill Clinton or Kennedy having sex with young women, Hillary holding mails in her personal accounts(probably so she could sell it to someone else), prime ministers holding accounts in fiscal heavens. This is only what we know, and it is a normal thing even on people on charge, people are not perfect. The people that know all of this have power and they could and actually legally blackmail those in power and they do.
We can go for Utopia and try to change every single human for it, which is impossible.
"Tolerance and respect" how much tolerance and respect have you seen in the last elections for example, when the people in power risked loosing their power? Zero. All politicians have personal dossiers of all adversaries and friends and no doubt they will use it if you are on their way to power, money or glory.