The law that triggered these banners already mandates that the website may not reduce functionality if the user rejects the cookies. Functionality-tied cookies are already exempted from the acceptance requirement.
These banners are the most-user-hostile possible response to the law, so it makes sense to automate getting rid of them.
Not everyone actually follows the law though, sometimes they mix in essential cookies and you have to click through a bunch of layers to turn them off without turning off essential ones.
I wouldn't be surprised if they find some way to defeat this in a not quite legal way and break stuff for people who use it.
That's not true. Directive 2002/58/EC explicitly says that it's fine to condition use of websites upon acceptance of cookies:
> Access to specific website content may still be made conditional on the well-informed acceptance of a cookie or similar device, if it is used for a legitimate purpose.
These banners are the most-user-hostile possible response to the law, so it makes sense to automate getting rid of them.