You don't address the issues that most ads are scams and it is possible to accidentally click ads. I recently asked google for directions to a new (to me) dentist while on vacation in Hawaii. As I started driving to the other side of the island I realized maps not taking me to the right town. Turns out apparently another dentist somehow made a scam ad so if you search for directions to the correct dentist it takes you to the scammer dentist instead. This is just one example of many. Screw ads and those who enable them.