You seem to be missing the obvious point: popularity of a product doesn't ensure the benefit of said product. There are tons of wildly popular products which have extremely negative outcomes for the user and society at large.
Let's take a weaker example, some sugary soda. Tons of people drink sugary sodas. Are they truly a net benefit to society, or a net negative social cost? Just pointing out that there are a high number of users doesn't mean it inherently has a high amount of positive social outcomes. For a lot of those drinkers, the outcomes are incredibly negative, and for a large chunk of society the general outcome is slightly worse. I'm not trying to argue sugary sodas deserve to be completely banned, but its not a given they're beneficial just because a lot of people bothered to buy them. We can't say Coca-Cola is obviously good for people because its being bought in massive quantities.
Do the same analysis for smoking cigarettes. A product that had tons of users. Many many hundreds of millions (billions?) of users using it all day every day. Couldn't be bad for them, right? People wouldn't buy something that obviously harms them, right?
AI might not be like cigarettes and sodas, sure. I don't think it is. But just saying "X has Y number of weekly active users, therefore it must be a net positive" as some example of it truly being a positive in their lives is drawing a correlation that may or may not exist. If you want to show its positive for those users, show those positive outcomes, not just some user count.
Uhhh… net positive for who exactly?