>>But, as far as most of the criticisms posted here, they're really unfounded. If you want to be a purist about privacy, you really have to just quit using technology. It's not realistic.
Exactly. It's not realistic because it's a strawman, and a disingenuous one at that.
No one really wants to be a "purist" about privacy. Indeed, the only way to live a 100% private life is to have a cabin on some uncharted island and never leave it.
Rational people, on the other hand, realize that there are certain privacy costs to living in modern society. They simply want to make informed decisions about which benefits to trade off those costs for.
What the author advises against is giving all your information to one company, i.e. Google. This holds especially true since said company's core business is serving you advertisements and generally controlling your Internet experience (using the "personal filter bubble" described in the article) using the information it has about you. Instead, he is suggesting that people spread their information across multiple service providers so that no single one of them can compile it to get a wholesome picture of who you are. The point is not to avoid giving your personal information (although the less you have to give, the better). The point is to avoid putting all of it in the hands of one company.