This is not unique to Facebook; Amazon, Google, Equifax and many other businesses build a profile on you regardless of whether you want them to or not.
My argument is that Google and Equifax are fundamentally different from Facebook, which amounts to pretty much just a website. Equifax obviously has immense impact on one's life because of the nature of the data they collect and their role in determining one's creditworthiness. Google also has a huge impact because of how critical their search product is to so many individuals and businesses. Facebook isn't really that important by comparison, it's just popular. For most people, Facebook is a silly addiction and time waster, using the site let's you view some photos and comments or maybe chat. That's it. It's just not a big deal.
How can you even know if it doesn't affect you (either positively or negatively)?