That seems really one sided. To me that indicates that I as a user have a right to know that a human and not a robot is responsible for me seeing this ad. That's not the case of course. What this would do is kneecap the enemy/users and let the advertisers be the only ones with access to automation and integrity validation.
I doubt that many objects to see ads for powertools on a DYI forum or developer tools on Stackoverflow, seems reasonable. The objection is to being bombarded by obvious scams, micro transaction laden mobile games, online casinos and anything that in no way benefits me as a consumer. Google should perhaps focus a bit more on validating the integrity of their consumers i.e. the advertisers.