Earlier quoted context omitted.
It doesn't matter what they want. It doesn't matter why they want it. They are not entitled to this information. They should not be able to know anything at all about us without our explicit consent. We should not have to sacrifice our privacy and peace of mind so that businesses can succeed. If they can't succeed without surveilling us and selling us out, then let them go bankrupt.
And you aren't entitled to visit their website. Seems like everything is working fine then? Most of them won't go bankrupt just because you stop visiting; based on reality, most of them are doing relatively fine.
Yes you are!
The GDPR prohibits conditioning the provision of service on consent to the processing of personal data. Thus mandating acceptance of advertisers tracking cookies ("cookie walls") without providing alternative means of website access are considered violations of the GDPR.