Why is Google still serving dodgy ads?

TLDR: AI is really good at detecting deceptive adverts - why isn’t Google using it? A couple of months ago I noticed this advert popping up in the YouTube app. The main reason I noticed it is that I accidentally clicked it - I knew I was running out of space on my iPhone and a minor lapse of concentration caught me out. These things can slip through even the best review processes, so I did my inte...