They probably need to account for parents allowing kids to use their account, so account age can be a factor but not an automatic pass.

One result of a US fine was making it clear that adults letting kids use their accounts is still a legal problem: https://www.ftc.gov/news-events/news/press-releases/2019/09/...

Note that this is adults letting kids use their accounts to view kids content, as the issue was parental approval for ad tracking.