For my own part, outside of OS and security software, which I feel should be 100% monolithic and black box, I'm fine with the idea of all text and code of every program and file being available to anyone who may wish to improve it.
Curious to hear why you think OS and security software should be black boxes and not open.
In general, do you not find carrying this level of paranoia on a daily basis is simply oppressive to your own well being?
As far as my daily life, no not really. I just live a life where I grant very few people a view into the things I consider private, and ensure that every two or three people know contradictory things without knowing the parts that put them together. It leads to a robust but distant social web.
Sounds exhausting, I can't imagine using that much mental energy to keep up this web, but your life your rules.