It will never be reasonable, feasible, or worth discussing that e.g. every day users run a linux only locked down desktop and never use their mobile phones. Every time a privacy topic comes up, there is always someone to come in and say "uninstall windows and OSX, delete all of your social media accounts and block the entire Internet, quit your job that requires you to use these devices and services, run your own mail server, if you REALLY care about privacy you'll essentially stop using the Internet, cut yourself off from all of society and make your devices unusable" -- which can offer advice for people looking to do this but adds little to the discussion around tracking, privacy, data security.
If you try to fight against advertisers and privacy-invading trackers and malware alone you will always lose. They are huge companies. They bribe your computer manufacturers to auto-install malware. They infect your operating systems. They have CAs. They have millions to spend on thousands of brilliant engineers who will work around anything you come up with to attack your security and privacy. An answer must be feasible for almost everybody so that we can all enact it collectively, technical or not, or it is no answer at all.