I think the argument in this context it’s more about how Google is acting as a company, and less about how the underlying technology is dangerous.

Like Google clearly intends to turn off the web traffic to anyone who isn’t them. They want to maximize the amount of time users are spending on their page, seeing ads served directly by them. With their ad monopoly liable to get broken up in court, they won’t be able to monopolize advertising on other websites, so they’re just going to prevent people from going to other websites.

The fall out for smaller websites, news, blogs, ect, will be that suddenly a lot of their traffic is going to disappear because Google is no longer sending people to them, instead Google will scrape their pages and then just give that information directly to users.