The best manifesto is an history manual.
Take any century in the last 2000 years of human history, and there are files about people. For long it was sculpted or hand written. Then it was printed. Now it's digital. But it's the same thing, only the scale and speed change.
And at any point during those centuries, somewhere in the world, some entity (it doesn't have to be the gov) does bad things with those files. It's different every time. Excluding, killing, tracking, stealing, controlling... The form changes every time, but it's the same thing: abuse of those files.
It would, of course, be less of a problem if the information access was perfectly symmetrical. If anybody could access anybody's data, society would probably have a hard time for a few years, then adjust. And maybe become more fair.
But that's not what's happening. Here it just reinforces power asymmetry. And it creates incentives with huge bias that affect everybody's life.
There are three reasons why people give your answer.
1 - We had a nice run for a few decades in North America and West Europe. It's been a sweet life. And the human mind sets it as a new baseline. Now people see this as normal, and something else as the exception.
However, those decades ARE the exception. An exception that needs maintenance to preserve as best as we can.
2 - We are already pretty bad at making the connection between our misery today and the consequences of our past lifestyle, but today's information system is making it extra hard.
There are several factors for this: those in power getting really good at PR, information overload, more levels of indirection between causes and consequences, and the whole system complexity that never ceases to increase.
3 - The convenience is huge, and the price delayed
We don't get tracked for free, we get huge convenience in exchange. Plus we don't pay the price immediately, nor individually. We pay it as a society, and since it's cumulative, it's not obvious how much it costs us. It will only be painful in ... Well nobody knows when.
In fact, not only doing things right would rip us from convenience, but we would individually pay a strong price on top, right now. While seeing everybody around not doing it.
It's the exact same problem than for global warming.
Not accepting tracking is a deep and important political decision that shapes the future of our entire society. It is as important as avoiding mixing the church and the state or defending freedom of speech.
And it's also why it's not a popular view: it requires to think about what society we want to build, and not just what life we hope to have individually.