Is it really? Let me try:
You're going down the street while eating some cookies, and suddenly you meet a friend.
Opt-in: A friend sees your cookies, and asks, "Can I have one?"
Opt-out: A friend starts taking and eating your cookies, and says, "Tell me if you want me to stop."
DNT by default is the correct behavior because it is desired by most users. When you’re designing software and you have options for a white background or black background and 75% of your users prefer black then that should be the default, everything else remaining equal.
Tracking is definitely an “opt in” behavior, not “opt out.”
This is just Google being dishonest. Although pretty minimal since they track and always say this dumb stuff how people want “personalized ads.” They know it’s not true, but it’s sort of a white lie and we get awesome, usually, functionality.
I suspect Google would have respected DNT if Microsoft had made it opt-in as it was intended.