All they need to do is popularize the idea of "if your website doesn't do X, it'll place lower on google" and people will do anything.
My websites still don't have cookie banners and the police still hasn't come to my house. And the websites uses cookies like every other website always did.
Much like the GDPR notices that a small industry of 'compliance' product companies sold seemingly to everyone as necessary, they aren't if you're only using cookies for functional reasons and not tracking people. Unfortunately that leads to lower margins for advertisers and we can't have that.