There has been a browser setting for tracking cookies since 2002! https://www.w3.org/P3P/ https://www.w3.org/P3P/ It has even been implemented in Internet Expl

There has been a browser setting for tracking cookies since 2002! https://www.w3.org/P3P/ https://www.w3.org/P3P/ It has even been implemented in Internet Explorer when it had 90%+ market share. And then Google intentionally sent malformed P3P header to bypass user preferences in IE. When Safari added a heuristic rejecting Google's 3rd party cookies, Google has found a technical workaround to bypass it (and has been fined for doing this). When IE and P3P were totally dead, browsers have tried to give adtech the simplest to implement bare minimum setting - the DNT header. The adtech has completely ignored it. There are trillion-dollar businesses relying on tracking, and they will do whatever they can to undermine any technology and lobby against any law that would harm their business.