Earlier quoted context omitted.
> i wish there were a browser plugin called "please accept all cookies" There's almost that. It doesn't always accept all cookies but it does hide the warnings: https://www.i-dont-care-about-cookies.eu/
Could there be a standard between browsers and websites to avoid those banners? Similar to the Do Not Track header, a Accept Cookies header? Contrary to ad-blocking where the website very much wants you to see ads, and is not going to help you in blocking them, this is a situation where they might be interested to help.
You might argue that we could save a pittance in bandwidth by eliding the Set-Cookie header entirely. However, the potential savings here is a drop in the bucket compared to the ocean of javascript to handle the consent banners.