Pretty much none of the cookie notices are legally valid, or we'd all have been trained to just click "no" on all of them (as "no" has to be as easy, or easier, to use than "yes")

And while you may be able to block cookies, are you able to block canvas fingerprinting? IRL tracking? the gdpr also applies to every bit of life, to the third parties a doctor can use to process your medical data, to the third parties having access to surveillance cameras in a parking lot, to the legal notifications required when your covid 19 test data or contact tracing data might be breached.