That's a symptom of:
* Stupid webmasters (you don't need that cookie popup for my session cookie)
* Greedy advertisers (that track me) and greedy web publishers that insist on including such privacy-violating scripts and third-parties on their sites
* Sheep user (that have become so accustomed to cookie popups they now just keep pressing the most colorful button)
Long live uBlock origin and its "annoyances" filters.