Is your privacy really that private?

People worry about using credit cards online, spying in public places, drones with cameras, and those satellites of the government that can take a pic of your house from space. How private is your privacy anyway? Even if you pay cash, the receipt shows your transaction number, the time and date, and who the checker was, even the items you purchased. If the store also has working security camera, a person who is able to get both pieces of info can place you there. If you used your cell while in the store, the record off whatever tower you used is further evidence you were at least in the area. Traffic cams capturing your car, if someone was able to get the footage, they know where you were driving. Mass transit, still no privacy, most busses, subways, BART trains, etc. have security cameras, someone could find out what train you took, and maybe even use station cameras to time your ticket then see what destinations were possible by the ticket, ticket kiosk, and time you purchased. Isn’t the illusion of privacy just means no one has free access to your info or whereabouts but is someone was able to tap the right info, even from various sources, your whole day could be recreated with much certainty?