Sites block for GDPR because they want to abuse visitor data and privacy
Sites block for OSA because they don't want to abuse visitor data and privacy
Canada and Australia are jumping in [2] [3].
[0]: https://ec.europa.eu/commission/presscorner/detail/en/ip_25_...
[1]: https://www.twobirds.com/en/insights/2024/france/la-loi-sren...
[2]:https://facia.ai/news/canada-proposes-age-checks-for-online-...
[3]: https://www.abc.net.au/news/2025-07-11/age-verification-sear...
If you are a local site by a local company on the other side of the world you don't need to block anyone, you just ignore foreign laws.
In the case of those news sites, though I suspect that most are owned by large multinational companies whose lawyers advised that blocking EU visitors is the only 100% sure way to avoid hypothetical retaliations by EU authorities.
However the privacy attacking malware they embed on there to mine data from their users would apply, and that's why they block it - because America allows abuse of their citizens data, but Europe doesn't.
Of course there is no enforcement for an entity attacking European citizens in this way so they could do it anyway, but like with cookie banners the point isn't to comply with a law, the point is to get citizens to blame the law rather than the abusers.
The best path is one of calamitous implementation that scares off other countries and embarrasses this one into a u-turn. But it's increasingly unlikely.
The UK law is basically a "go figure it out", which inevitably leads to making shady deals with third parties that are now handling the data of citizens... privacy and data leakage issues abound.
The EU meanwhile is working on a whitelabel application that can confirm nothing other than "this user is above 18" (which they can do because the EU has national ID for basically anyone living in it. It also works for another set of age ranges, as the idea is to also use this to confirm stuff like buying alcohol) and is designed to be easy to implement for anyone without having to get approval from the EU first. (Technical specification is available here[0]). It's not perfect (last I saw, they're apparently tying it to Google Play Services for device verification), but it's a far better attempt than the UK/Australia are doing.