I completely agree with you, but what this shows is a momentous change in the landscape of the internet, facilitated by mass marketing, data collection, commercialisation and even financialisation of digital game assets.
This is a huge shift that cannot be rectified by simple age filters.
Being realistic about the problem requires being realistic about ill-conceived solutions with conspicuous benefits for commercial actors.
Besides an array of largely static, non-interactive websites, there is no hard line between content that is suitable for young eyes and not.