Those cookie banners are a choice: websites can choose to simply not spy on you with cookies and thus not need to ask permission for spying.

And users can install plugins to always deny as much of them as possible, or delete them after closing the tab.

In my opinion, cookie banners mean that you have an active choice of whether or not you want any data to be stored in your browser and whether you want to be statefully tracked or just retain basic functionality.

Everyone has a different threat model; but it should be up to us to decide what we want rather than not having the choice.