The article argues that your assumption that "advanced" techniques used by motivated governments now will stay the exclusive domain of those governments is wron

The article argues that your assumption that "advanced" techniques used by motivated governments now will stay the exclusive domain of those governments is wrong. IT systems and networks have become so large and complex that vulnerabilities are everywhere. Your home computer may have a small enough attack surface by itself, but is constantly communicating with systems who don't - and much of your important data is kept in those anyway.