You're still tracked, analyzed, and targeted both on and off the web by thousands of companies. Not to mention government snooping and surveillance. Even the social media giants which you deliberately never signed up for are still collecting and monetizing data on you.
If you never run JavaScript, don't use an IP traceable to you, then you're probably safe from tracking. But GDPR applies offline too, so your insurance company can't increase your bill because you drink too much coffee and have a loyalty card, without you being able to trace that link.