Earlier quoted context omitted.
They are not forced to use banners, they are forced to get explicit opt-in permission before tracking users, which can be done in non-obtrusive ways.
Okay, so regard the Do_Not_Track header as explicit opt-out permission
The annoyance of the cookie banners is the entire draw for companies. Its not a downside. They're user-hostile. You are their enemy. Their goal is to wear you down and trick you into opting-in, so they can both track with impunity and follow the law.