All my gadgets don't have access to my WIFI network. They connect and report to a HUB which communicates with my phone in a secure way. (end-to-end encryption)
Of course, if you go into the "deep-state" shit, there is no %100 security. You're being tracked by using a laptop/pc/mobile device. You're making "deep-state, "hackers", "stalkers" happy. :)