The world is rich in complexity and devoid of absolutes. I've yet to see someone build an ivory tower with the foundations to stand more than a small shove.
Because we are all those fools. Do you use gmail? If you don't, do you email people who do? Do you use Facebook? Do people talk about you on Facebook, even if you don't have an account? Do you email people who give Facebook their contacts? Is that even something you can find out?
Trust is transitive. If someone close to you along your social graph is being observed, you are being observed indirectly. If many people around you are being observed, you are being observed rather closely.
I don't use Gmail. I don't use Facebook. For just those reasons. I do use uBlock Origin, NoScript, uMatrix, and Random Agent Spoofer, and depending on the site a VPN. I don't throw up my hands and pretend that a platform like Facebook is somehow fundamental to life.
I'm afraid you've missed my point, because I don't use those services either. No man is an island. And very few of them are OpSec masters, either. For instance, consider how unique that precise set of tools is, how easy it is to fingerprint browser extensions, and how you've effectively announced your identity in a public forum.
(Edit: Though doing that without JavaScript would be a pretty neat trick. I'm pretty sure it'd be possible to do if you can convince tags to load sequentially, so you can send requests to your server interleaved with requests for add-on resources, and observe timing. I'm thinking many levels of nested iframes ought to do the trick. But I don't know that for a fact.)
What I am trying to say is that this is hard, and we cannot solve anything by oversimplifying or victim blaming.
Besides, victim facilitation and precipitation is an ugly, and sad reality of life. You can be aware of your role in becoming a victim, without blaming yourself for the actions of other people who took advantage of your situation.
As to the rest, again, we're not talking about dropping off the grid or avoiding a government, just about not broadcasting everything all of the time for some paltry "free" service.
But stay safe and have a good life anyway, traveler.