You don't mind Google using your kids to train their models and advertising algorithms?

Years from now they'll be getting "hey look at BIKE BRANDS' NEWEST CHEAP BIKE REMEMBER WHEN YOU USED TO RIDE BIKE BRAND BIKES"

I think most people really don't care, and/or will just adblock those sorts of things when they do arrive.

What about in 10 years when they auto search and label users for political dissent and likelihood of impact

That's for future them to worry about, they'll think. Honestly I've never seen people historically care about privacy even if it means the government rounds them up, people simply don't seem to care at all, and trying to make them care is a futile effort in my experience.

Don't worry. Most people spend most of their compute time on a phone, where you're ability to filter ads is way more enshitified.