Actually, you may wish to have an "extended" experience on some websites and not on others: all cookies are not either technically essentials or pure ad-junk tracking!!!

So it's sensible to allow a per-website configuration. Arguably, it would be better that this is included in the browser (like DoNotTrack was) with a configurable default (refuse all/always ask/accept all... and "always ask" ticked out of the box) and a widget showing if the website is in accept all/refuse all and allowing to change it... a bit like the uBlock extension