Recording at most would allow someone to establish time & place. It will not allow them to know my political opinions, to know them my financial situation, etc. Giving up on your privacy because of THAT is really foolish.
Really?
Dude, you'd be surprised at what can be discerned, discovered, and determined just by tracking things like your travel and purchases, the cell phone IDs you're in proximity to, etc etc. With enough data it's not hard at all to "connect" groups of people and cross-index what's known about them.
All of the measures you described are easy to uncover and obtain data from. You call a cab? There's a record of where it started and stopped. If you carried a phone (not just your phone, any phone), there's a record of that. You could wear a full-face mask, but that in itself is a distinctive "marker". And there are cameras everywhere that show what you're wearing, how you walk, what you may have carried, etc etc etc.
Or for example, if you hang out with people that are known to belong to "Political Party A", the chances are that you also belong to "Political Party A". And maybe not, maybe you're just the caterer.
BUT, after you collect thousands and thousands of data points on a person, connecting those data sets to other similar data sets and drawing inferences from them is trivial. You won't be right 100% of the time, but is 98% good enough for most purposes?
Privacy is dead, most people just don't want to admit how dead it is.