Do you really believe that your computer asking you if you're over 18 is government spying? I don't believe that you really believe that.
It's also the tired old argument that's constantly raised by encryption ban/backdoor proponents too. How many times do they have to be debunked, ugh.
If you're against the EFF on these kind of issues, it's typically a good time to reevaluate your position.
Furthermore, age verification is being pushed at multiple jurisdictions across the globe. They're trying multiple approaches to get this through and seeing what sticks.