I'll admit I'm someone who has always said "I have nothing to hide." Do I want someone physically recording me outside my window while changing clothes? No. But the majority of the time, we're just talking about targeted advertisements (which I actually prefer over random crap). Or a system that listens to keywords on phone calls that may identify and deter a terrorist threat. I don't see how this relates to "freedom…
Are you happy to share your net worth, bank and credit account balance and activity with advertisers?
Are you ok with some AI determining (based on its opaque reasoning) that you are a potential terrorist threat, and should be imprisoned?
Even if you are okay with all the above, do you recognize that not all of society would agree and that some people could even be put into grave danger due to eg: political, religious, sexual etc views? In an extreme case, if "most" people are open and "have nothing to hide", it means that everyone who isn't open must "have something to hide" and should be persecuted. Normalizing this openness actually inches us toward this extreme.
Also you should recognize that your answer based on today's government and political parties may not resemble the parties that hold power in the future. Does an extreme group -- who is the farthest from your own views and in fact violently disagrees with your lifestyle choices -- taking power in the future not worry you at all?