We have a home button. We have forward and back. We have 'bookmark' buttons, which many people understand. A big 'COOKIE' button, on the main browser UI, that clearly show cookie info, with a big "GET RID OF ALL COOKIES" trashcan button right there.... that would have prevented 90+% of the scare and legislation efforts from the start.
I looked for "clear my cookies" - in 2021, it's still click '3 dots' or something else, then click something, then click something, then confirm. https://its.uiowa.edu/support/article/719
"But there's so much nuance - I want to keep some, and not others, etc".
We didn't have this many choices in 1998. My point is giving a big honking "get rid of it all" back then would have changed the trajectory of the entire discussion. It still might.
I've lived through 2 decades of having to deal with support people trying to help users "clear your cache" or "reset your cookies". "Private mode" does help to a degree, assuming you're dealing with somewhat tech-savvy folks.