It has its good sides. Preventing people from being scammed is one of them. Google is a strong engine for advertising and it will take effect on crypto promotion. But I hope that legit projects can get their space because otherwise, it wouldn't be fair.
No one has ever been able to protect people from scams. They exist so many years as there are people. Prohibition of advertising Google does not help to solve the problem. It seems to me that all Internet giants were bribed by oligarchs from the stock market. I don't believe these monsters voluntarily gave up a lot of money. For me, this is a signal that cryptocurrencies are on the right track.
Same perceptions and beliefs on where I do believe theres always a reason behind with these kind of decisions towards banning/restricting ads came from ICO and other crypto-related things.You are actually right on where there were no one would able to protect people from scams and such prohibition being made by Google doesn't only being considered on their own but there always an influence from big people/institution.