Cookie banners are not analogous. It's easy to make a web site that doesn't need cookie banners. It's actually easier to make a site that doesn't need them than to make one that does. Adding in the tracking that requires banner takes effort. But companies prefer to put in that effort and annoy their users so they can have that tracking. That's 100% on them, not on the government.
This is making the assumption that the company has already paid the significant legal fees to see if they need the banner or not. Or ignoring the companies that think it is easier to add the banner than pay a law firm to review it's data usage.
It's like 'Hey, I make T-shirts. I want to sell them to anyone who visits my website. Do I need a cookie banner? I don't know. I do collect personal information to facilitate the transaction. I do retain the information for refund purposes. I do log IP addresses. Is this covered without a banner? Am I 'safer' to just make a banner saying we are saving their data and using it? I can't afford a lawyer to review everything we do, but I can afford a developer to make a banner like they did on other sites. Even if they implement it incorrectly, I think it's worth the cost to have the banner because I probably won't be liable if I attempted to follow the law. And maybe I'm wrong there because again, I have no idea what the letter of the law requires. I just make t-shirts and want to sell them.'