Online advertising stalks you even if you're not looking at the ads. Opting out of online advertising basically means you need to go live in the woods and never interact with modern society again. Every interaction you'd have with technology will have something to do with ads one way or another, even if just buying paid products in a physical store thanks to Bluetooth/Wi-Fi MAC address tracking, face recognition, not to mention loyalty cards (but at least you can opt-out of that one).

>Opting out of online advertising basically means you need to go live in the woods and never interact with modern society again

No, it just means you need to not open a web browser, or install an ad blocker. Opting out of physical advertising literally means this. I'm not saying that online advertising isn't bad, but physical advertising is inescapable. Your very food packaging is covered in it. The real world has primacy here, because you live in it and can't turn it off.